# file: global_CCl4_MM.dat # # Atmospheric measurements of CCl4 (Carbon Tetrachloride, CT) # # Measurements are from the NOAA/ESRL/GMD/HATS flask program # (http://www.esrl.noaa.gov/gmd/hats/flask/flasks.html). # Instrument ID: Otto # # Location: Global -- Monthly Global-Hemispheric Means # See http://www.esrl.noaa.gov/gmd/dv/site/site_table.html#hats_flask for # more information about flask sampling sites. # # The data reported are from samples collected approximately once per week in # matching, concurrent, flask pairs and later analyzed on a gas chromatograph # with electron capture detection (GC-ECD) located in Boulder, Colorado, USA. # This system uses two standard reference gases for calibration and has been # in operation since very early in 1995. # # CCl4 loss during storage in stainless-steel canisters arises most commonly at # high-latitude and/or high-altitude sites where the air is dry (i.e. ALT, BRW, # MLO, NWR, and SPO -- especially in winter). Extra efforts have been made to # flag samples suspected of suffering from this known artifact, thereby barring # them from inclusion in monthly mean estimates. The user is cautioned, # however, that small biases to the low side may nevertheless remain. # # These data represent monthly global and hemispheric mean estimates computed # using data from the monthly companion files named *_CCl4_MM.dat, where * # refers to a 3-character baseline site code. For any given month in the more # recent period, data from as many as 12 sites may be used to derive the global # mean, including as many as 4 sites in the southern hemisphere and up to 8 in # the northern hemisphere. From north to south, these baseline sites include # ALT, SUM, BRW, MHD, THD, NWR, MLO, KUM, SMO, CGO, PSA, and SPO: # # ALT - Alert, Canada 82.45 N 62.51 W 190 m # SUM - Summit, Greenland 72.60 N 38.42 W 3209 m # BRW - Barrow, Alaska 71.32 N 156.61 W 11 m # MHD - Mace Head, Ireland 53.33 N 9.90 W 5 m # THD - Trinidad Head, California 41.05 N 124.15 W 107 m # NWR - Niwot Ridge, Colorado 40.05 N 105.59 W 3523 m # MLO - Mauna Loa, Hawaii 19.54 N 155.58 W 3397 m # KUM - Cape Kumukahi, Hawaii 19.52 N 154.82 W 3 m # SMO - Tutuila, Samoa 14.25 S 170.56 W 42 m # CGO - Cape Grim, Tasmania 40.68 S 144.69 E 94 m # PSA - Palmer Station, Antarctica 64.92 S 64.00 W 10 m # SPO - South Pole, Antarctica 89.98 S 24.80 W 2810 m # # The global and hemispheric uncertainties reported here are bootstrapped from # 1000 'resamples' of the input monthly means drawn in accordance with the # uncertainties reported in the companion files. # # The limited number of stations in the southern hemisphere, in combination # with the dry-air-in-stainless-steel artifact issue mentioned above that # severely affects the early SPO data, and the late onset of sampling at PSA, # precludes the availability of reliable measurements that are representative # of the southern high latitudes prior to the year 2001. Therefore, southern # hemispheric means from this period are derived entirely from measurements at # SMO and CGO after using these data to manufacture extended data ranges for # SPO and PSA based on observed gradients across the southern hemisphere during # the period after 2001 when all four stations were reporting reliable data. An # effort to modestly compensate for gradient changes as the data is pushed # backward in time toward the CCl4 growth-to-decay turnover point (~1991) was # also made. Uncertainties for the manufactured data were estimated by # combining the uncertianties for SMO/CGO with an additional uncertainty # derived from the gradient estimates. These extended SPO/PSA data were then # weighted in the normal fashion against the SMO/CGO data for computing the # southern hemispheric and global means. The uncertainties were bootstrapped as # described above after incorporating this manufactured data into the # computation. # # PIs: Dr. James W. Elkins, Dr. Bradley D. Hall, # Debra J. Mondeel, J. David Nance # # National Oceanic and Atmospheric Administration (NOAA) # Earth System Research Laboratory (ESRL) # 325 Broadway, R/GMD1 # Boulder, CO 80305-3328 # # Email: James.W.Elkins@noaa.gov; Bradley.Hall@noaa.gov # Phone: (303) 497-6224 (303) 497-7011 # # Email: Debra.J.Mondeel@noaa.gov; David.Nance@noaa.gov # Phone: (303) 497-6013 (303) 497-7002 # # Fax: (303) 497-6290 # # Data use policy: # If you use this data in a publication or report, we would appreciate that you # contact the principal investigators (PIs) first and discuss your interests. # The PIs can discuss the quality of the data and any potential problems with # its analysis. Please contact the PIs for more information. The data should # be cited in presentations or publications along the following lines: Carbon Tetrachloride # data from the NOAA/ESRL halocarbons flask program. # # Calibration scale: NOAA 2008 # See http://www.esrl.noaa.gov/gmd/ccl/scales.html for more information about # calibration scales. # # Units: ppt # # Mising value: "nan" # # Data Columns: # yr Year # mon Month # NHm Northern Hemispheric mean concentration of CCl4 in ppt # NHsd Northern Hemispheric standard deviation # SHm Southern Hemispheric mean concentration # SHsd Southern Hemispheric standard deviation # GLm Global mean concentration # GLsd Global standard deviation # CCl4ottoyr CCl4ottomon CCl4ottoNHm CCl4ottoNHsd CCl4ottoSHm CCl4ottoSHsd CCl4ottoGLm CCl4ottoGLsd 1996 1 nan nan nan nan nan nan 1996 2 nan nan nan nan nan nan 1996 3 nan nan nan nan nan nan 1996 4 105.318 0.197 102.969 0.238 104.144 0.155 1996 5 105.032 0.193 102.754 0.287 103.893 0.174 1996 6 105.327 0.277 103.086 0.273 104.207 0.191 1996 7 105.250 0.171 103.021 0.233 104.136 0.147 1996 8 104.855 0.239 102.817 0.213 103.836 0.161 1996 9 104.909 0.248 102.813 0.441 103.861 0.254 1996 10 104.735 0.234 102.868 0.435 103.801 0.250 1996 11 104.709 0.280 102.241 0.291 103.475 0.205 1996 12 104.213 0.228 102.640 0.278 103.427 0.176 1997 1 104.162 0.225 102.510 0.233 103.336 0.157 1997 2 104.221 0.293 102.411 0.235 103.316 0.184 1997 3 104.121 0.285 102.452 0.382 103.287 0.236 1997 4 104.262 0.272 102.243 0.194 103.252 0.170 1997 5 104.351 0.220 102.025 0.205 103.188 0.149 1997 6 104.121 0.222 102.327 0.209 103.224 0.154 1997 7 103.928 0.237 101.899 0.244 102.914 0.170 1997 8 103.793 0.179 101.704 0.319 102.748 0.183 1997 9 103.714 0.278 101.889 0.192 102.802 0.166 1997 10 103.636 0.190 101.324 0.222 102.480 0.146 1997 11 103.568 0.200 101.924 0.282 102.746 0.177 1997 12 103.654 0.245 101.628 0.326 102.641 0.204 1998 1 103.448 0.225 101.697 0.373 102.572 0.221 1998 2 103.540 0.184 101.644 0.297 102.592 0.173 1998 3 103.705 0.323 101.207 0.241 102.456 0.201 1998 4 103.374 0.298 100.867 0.215 102.121 0.187 1998 5 103.164 0.236 101.198 0.155 102.181 0.139 1998 6 103.148 0.209 100.852 0.268 102.000 0.171 1998 7 103.038 0.164 100.944 0.272 101.991 0.157 1998 8 102.927 0.284 100.460 0.143 101.693 0.158 1998 9 102.680 0.147 100.773 0.167 101.727 0.110 1998 10 102.585 0.171 100.705 0.168 101.645 0.119 1998 11 102.804 0.171 101.244 0.342 102.024 0.190 1998 12 102.487 0.204 101.000 0.159 101.744 0.132 1999 1 102.231 0.198 100.910 0.239 101.570 0.153 1999 2 102.170 0.160 101.037 0.286 101.603 0.163 1999 3 102.468 0.128 100.735 0.226 101.601 0.131 1999 4 102.197 0.159 101.052 0.124 101.624 0.101 1999 5 102.039 0.237 100.020 0.288 101.030 0.187 1999 6 101.993 0.241 100.204 0.334 101.099 0.212 1999 7 101.384 0.124 99.874 0.184 100.629 0.112 1999 8 101.435 0.162 100.041 0.126 100.738 0.102 1999 9 101.575 0.146 99.777 0.166 100.676 0.108 1999 10 101.525 0.175 99.835 0.215 100.680 0.141 1999 11 101.242 0.142 99.908 0.139 100.575 0.102 1999 12 101.184 0.197 99.982 0.395 100.583 0.216 2000 1 101.197 0.165 100.130 0.196 100.663 0.128 2000 2 101.019 0.165 99.797 0.177 100.408 0.124 2000 3 100.714 0.194 99.385 0.289 100.049 0.171 2000 4 100.571 0.254 99.190 0.262 99.881 0.182 2000 5 100.762 0.162 98.757 0.284 99.759 0.165 2000 6 100.626 0.200 98.316 0.363 99.471 0.207 2000 7 100.347 0.250 98.300 0.238 99.323 0.173 2000 8 100.636 0.235 98.355 0.306 99.495 0.198 2000 9 100.287 0.146 98.078 0.249 99.183 0.140 2000 10 100.375 0.213 98.296 0.176 99.336 0.140 2000 11 100.624 0.167 98.635 0.347 99.629 0.194 2000 12 100.503 0.169 98.671 0.257 99.587 0.155 2001 1 100.477 0.213 98.848 0.318 99.662 0.193 2001 2 100.047 0.161 97.824 0.149 98.935 0.110 2001 3 99.946 0.174 98.220 0.134 99.083 0.109 2001 4 100.129 0.132 97.680 0.283 98.905 0.155 2001 5 99.961 0.227 97.947 0.159 98.954 0.135 2001 6 99.863 0.189 97.706 0.147 98.784 0.120 2001 7 99.743 0.181 97.454 0.241 98.599 0.154 2001 8 99.545 0.144 97.641 0.320 98.593 0.176 2001 9 99.629 0.176 97.350 0.248 98.490 0.153 2001 10 99.650 0.200 97.412 0.297 98.531 0.174 2001 11 99.583 0.154 97.135 0.359 98.359 0.198 2001 12 99.389 0.209 97.107 0.222 98.248 0.150 2002 1 99.150 0.146 97.364 0.139 98.257 0.101 2002 2 99.073 0.146 97.410 0.224 98.241 0.135 2002 3 99.101 0.123 97.136 0.194 98.119 0.115 2002 4 98.955 0.172 96.532 0.131 97.744 0.107 2002 5 98.599 0.095 96.502 0.220 97.551 0.119 2002 6 98.585 0.148 96.408 0.184 97.496 0.117 2002 7 98.350 0.166 96.379 0.173 97.365 0.120 2002 8 98.243 0.137 96.259 0.156 97.251 0.104 2002 9 98.543 0.145 96.016 0.208 97.280 0.128 2002 10 98.470 0.149 96.311 0.270 97.390 0.150 2002 11 98.304 0.230 96.320 0.326 97.312 0.197 2002 12 98.472 0.323 96.093 0.185 97.282 0.191 2003 1 97.856 0.103 95.815 0.173 96.836 0.104 2003 2 97.735 0.120 95.553 0.287 96.644 0.152 2003 3 97.743 0.113 95.705 0.109 96.724 0.077 2003 4 97.580 0.111 95.516 0.237 96.548 0.132 2003 5 97.501 0.090 95.370 0.189 96.435 0.105 2003 6 97.589 0.103 95.268 0.162 96.429 0.099 2003 7 97.266 0.128 95.105 0.154 96.185 0.100 2003 8 96.884 0.174 95.046 0.213 95.965 0.139 2003 9 97.144 0.145 94.966 0.112 96.055 0.091 2003 10 97.098 0.117 94.879 0.112 95.989 0.079 2003 11 96.787 0.142 94.946 0.221 95.867 0.131 2003 12 96.747 0.099 94.918 0.177 95.833 0.102 2004 1 96.757 0.095 94.640 0.486 95.698 0.246 2004 2 96.400 0.183 94.921 0.143 95.661 0.116 2004 3 96.476 0.144 94.716 0.153 95.596 0.105 2004 4 96.614 0.080 94.595 0.145 95.605 0.082 2004 5 96.652 0.113 94.406 0.115 95.529 0.080 2004 6 96.410 0.136 94.309 0.167 95.360 0.108 2004 7 96.287 0.074 94.212 0.175 95.249 0.096 2004 8 96.282 0.087 94.393 0.215 95.337 0.118 2004 9 96.144 0.101 94.059 0.124 95.102 0.082 2004 10 96.057 0.181 93.887 0.177 94.972 0.129 2004 11 95.828 0.136 93.946 0.194 94.887 0.123 2004 12 96.008 0.092 94.076 0.124 95.042 0.077 2005 1 95.990 0.079 94.107 0.195 95.048 0.106 2005 2 95.812 0.101 93.921 0.137 94.867 0.086 2005 3 95.755 0.106 94.026 0.259 94.891 0.137 2005 4 95.647 0.126 93.773 0.151 94.710 0.098 2005 5 95.706 0.098 93.503 0.141 94.605 0.087 2005 6 95.508 0.140 93.419 0.126 94.464 0.095 2005 7 95.311 0.116 93.173 0.121 94.242 0.082 2005 8 95.095 0.105 93.244 0.173 94.169 0.104 2005 9 94.896 0.083 93.131 0.113 94.014 0.070 2005 10 94.998 0.105 92.979 0.100 93.988 0.073 2005 11 95.073 0.132 93.134 0.168 94.103 0.106 2005 12 95.070 0.153 93.157 0.181 94.113 0.116 2006 1 94.665 0.138 93.040 0.158 93.852 0.103 2006 2 94.382 0.121 92.943 0.122 93.662 0.085 2006 3 94.447 0.113 92.840 0.152 93.644 0.093 2006 4 94.252 0.124 92.675 0.261 93.463 0.146 2006 5 94.155 0.126 92.545 0.295 93.350 0.160 2006 6 94.113 0.168 92.377 0.100 93.245 0.098 2006 7 93.912 0.086 92.269 0.140 93.090 0.082 2006 8 93.697 0.093 92.150 0.138 92.923 0.083 2006 9 93.567 0.104 92.063 0.116 92.815 0.079 2006 10 93.677 0.089 91.923 0.128 92.800 0.078 2006 11 93.734 0.114 92.039 0.130 92.886 0.086 2006 12 93.594 0.132 92.043 0.161 92.818 0.104 2007 1 93.477 0.110 91.814 0.174 92.646 0.105 2007 2 93.275 0.114 91.915 0.153 92.595 0.096 2007 3 93.102 0.164 91.787 0.167 92.445 0.119 2007 4 93.083 0.110 91.601 0.239 92.342 0.132 2007 5 93.035 0.110 91.374 0.101 92.205 0.075 2007 6 93.118 0.112 91.195 0.229 92.157 0.127 2007 7 93.070 0.123 91.307 0.201 92.188 0.117 2007 8 92.969 0.119 91.133 0.121 92.051 0.083 2007 9 92.873 0.123 90.957 0.175 91.915 0.109 2007 10 92.415 0.136 90.738 0.152 91.577 0.098 2007 11 92.520 0.146 90.899 0.123 91.710 0.093 2007 12 92.185 0.158 90.783 0.151 91.484 0.112 2008 1 92.123 0.115 90.915 0.122 91.519 0.083 2008 2 91.981 0.099 90.839 0.109 91.410 0.073 2008 3 91.906 0.090 90.583 0.215 91.245 0.117 2008 4 91.535 0.115 90.311 0.157 90.923 0.098 2008 5 91.929 0.130 90.126 0.259 91.027 0.149 2008 6 91.575 0.115 89.753 0.237 90.664 0.131 2008 7 91.095 0.093 89.410 0.121 90.252 0.076 2008 8 91.045 0.147 89.428 0.124 90.236 0.096 2008 9 90.838 0.088 89.180 0.122 90.009 0.073 2008 10 90.917 0.110 89.276 0.111 90.097 0.079 2008 11 90.775 0.110 89.154 0.114 89.965 0.078 2008 12 90.532 0.119 89.029 0.168 89.781 0.104 2009 1 90.358 0.132 89.226 0.215 89.792 0.129 2009 2 90.139 0.099 89.055 0.155 89.597 0.091 2009 3 90.067 0.108 88.983 0.149 89.525 0.092 2009 4 89.990 0.097 88.691 0.195 89.341 0.111 2009 5 89.909 0.116 88.575 0.120 89.242 0.083 2009 6 89.900 0.118 88.331 0.170 89.115 0.103 2009 7 89.721 0.090 88.274 0.149 88.997 0.088 2009 8 89.763 0.084 88.220 0.192 88.992 0.103 2009 9 89.953 0.096 88.480 0.201 89.217 0.110 2009 10 90.028 0.138 88.320 0.105 89.174 0.088 2009 11 89.960 0.102 88.499 0.190 89.230 0.107 2009 12 89.840 0.120 88.405 0.155 89.122 0.098 2010 1 89.708 0.127 88.453 0.226 89.081 0.131 2010 2 89.707 0.130 88.006 0.208 88.856 0.125 2010 3 89.449 0.123 88.097 0.141 88.773 0.093 2010 4 89.557 0.104 87.935 0.184 88.746 0.106 2010 5 89.526 0.098 87.704 0.195 88.615 0.112 2010 6 89.056 0.093 87.530 0.166 88.293 0.095 2010 7 88.984 0.108 87.540 0.100 88.262 0.072 2010 8 89.105 0.096 87.578 0.113 88.342 0.073 2010 9 88.972 0.098 87.307 0.188 88.140 0.108 2010 10 88.894 0.107 87.154 0.131 88.024 0.086 2010 11 88.607 0.122 87.180 0.160 87.893 0.100 2010 12 88.581 0.129 87.143 0.174 87.862 0.106 2011 1 88.628 0.090 87.191 0.125 87.910 0.077 2011 2 88.374 0.123 87.075 0.248 87.725 0.141 2011 3 88.367 0.129 86.988 0.148 87.677 0.097 2011 4 88.102 0.102 86.320 0.138 87.211 0.088 2011 5 87.808 0.156 86.259 0.122 87.034 0.099 2011 6 87.738 0.123 86.043 0.131 86.890 0.091 2011 7 87.675 0.090 86.016 0.173 86.845 0.098 2011 8 87.509 0.098 85.817 0.117 86.663 0.075 2011 9 87.462 0.125 85.793 0.124 86.627 0.088 2011 10 87.316 0.095 85.767 0.133 86.542 0.081 2011 11 87.526 0.119 85.845 0.131 86.685 0.090 2011 12 87.291 0.160 85.692 0.311 86.491 0.176 2012 1 87.135 0.157 85.572 0.216 86.354 0.134 2012 2 86.759 0.146 85.353 0.188 86.056 0.116 2012 3 86.872 0.121 85.368 0.171 86.120 0.103 2012 4 86.623 0.107 85.178 0.142 85.900 0.091 2012 5 86.743 0.107 85.144 0.220 85.944 0.120 2012 6 86.832 0.080 85.264 0.244 86.048 0.128 2012 7 86.552 0.137 84.776 0.267 85.664 0.149 2012 8 86.431 0.094 84.900 0.175 85.665 0.099 2012 9 86.463 0.108 84.680 0.276 85.571 0.147 2012 10 86.453 0.149 84.624 0.201 85.538 0.124 2012 11 86.391 0.160 84.587 0.207 85.489 0.133 2012 12 86.071 0.187 84.532 0.185 85.301 0.131 2013 1 86.028 0.116 84.374 0.288 85.201 0.156 2013 2 86.091 0.168 84.629 0.167 85.360 0.120 2013 3 85.877 0.141 84.309 0.188 85.093 0.115 2013 4 85.748 0.124 84.371 0.143 85.060 0.095 2013 5 85.716 0.152 84.219 0.190 84.967 0.118 2013 6 85.741 0.165 84.031 0.200 84.886 0.129 2013 7 85.386 0.136 83.945 0.190 84.666 0.117 2013 8 85.476 0.318 84.054 0.368 84.765 0.247 2013 9 85.388 0.402 83.559 0.923 84.474 0.502 2013 10 85.259 0.879 83.762 0.228 84.510 0.456 2013 11 85.059 0.265 83.479 0.178 84.269 0.160 2013 12 84.907 0.191 83.609 0.153 84.258 0.123 2014 1 85.037 0.140 83.650 0.117 84.343 0.090 2014 2 84.966 0.148 83.578 0.188 84.272 0.121 2014 3 84.777 0.208 83.114 0.234 83.946 0.156 2014 4 84.709 0.276 82.965 0.235 83.837 0.181 2014 5 84.629 0.199 82.746 0.246 83.687 0.159 2014 6 84.629 0.152 82.708 0.237 83.669 0.139 2014 7 84.363 0.158 82.524 0.140 83.444 0.106 2014 8 84.491 0.121 82.308 0.248 83.400 0.138 2014 9 84.249 0.167 82.220 0.176 83.235 0.119 2014 10 84.343 0.156 82.337 0.181 83.340 0.120 2014 11 84.272 0.183 82.465 0.124 83.368 0.113 2014 12 84.108 0.151 82.260 0.130 83.184 0.099 2015 1 83.854 0.167 82.218 0.216 83.036 0.138 2015 2 83.769 0.144 82.201 0.173 82.985 0.110 2015 3 83.458 0.176 81.901 0.148 82.680 0.116 2015 4 83.401 0.142 81.769 0.135 82.585 0.101 2015 5 83.301 0.118 81.543 0.134 82.422 0.088 2015 6 83.276 0.163 81.429 0.153 82.353 0.114 2015 7 83.327 0.158 81.315 0.145 82.321 0.107 2015 8 83.120 0.106 81.233 0.133 82.176 0.083 2015 9 83.175 0.132 81.197 0.132 82.186 0.094 2015 10 83.230 0.129 81.172 0.191 82.201 0.115 2015 11 82.919 0.095 81.103 0.186 82.011 0.105 2015 12 82.894 0.147 81.090 0.166 81.992 0.111 2016 1 82.616 0.222 80.988 0.176 81.802 0.143 2016 2 82.457 0.188 81.067 0.270 81.762 0.161 2016 3 82.630 0.280 80.968 0.356 81.799 0.222 2016 4 82.089 0.220 80.505 0.291 81.297 0.184 2016 5 82.362 0.169 80.552 0.225 81.457 0.140 2016 6 82.414 0.194 80.560 0.271 81.487 0.167 2016 7 82.187 0.218 80.319 0.293 81.253 0.183 2016 8 82.071 0.184 80.168 0.298 81.119 0.179 2016 9 82.222 0.169 80.257 0.203 81.240 0.132 2016 10 81.847 0.142 79.932 0.173 80.890 0.111 2016 11 81.997 0.156 80.075 0.182 81.036 0.118 2016 12 82.233 0.222 80.019 0.283 81.126 0.176 2017 1 81.929 0.250 80.027 0.243 80.978 0.178 2017 2 81.804 0.192 79.822 0.164 80.813 0.126 2017 3 81.731 0.167 79.707 0.303 80.719 0.176 2017 4 81.787 0.202 79.573 0.208 80.680 0.144 2017 5 81.644 0.219 79.268 0.519 80.456 0.281 2017 6 81.559 0.232 79.383 0.181 80.471 0.142 2017 7 81.130 0.276 79.144 0.342 80.137 0.219 2017 8 81.097 0.210 78.846 0.286 79.972 0.176 2017 9 81.025 0.266 78.923 0.392 79.974 0.235 2017 10 81.096 0.162 78.991 0.311 80.043 0.175 2017 11 80.963 0.279 78.802 0.437 79.882 0.256 2017 12 80.639 0.282 79.027 0.192 79.833 0.173 2018 1 80.774 0.257 78.916 0.361 79.845 0.221 2018 2 80.353 0.216 78.678 0.186 79.515 0.142 2018 3 79.928 0.211 78.382 0.272 79.155 0.177 2018 4 80.263 0.331 78.700 0.204 79.481 0.194 2018 5 80.079 0.298 78.479 0.350 79.279 0.233 2018 6 79.997 0.207 78.104 0.303 79.051 0.184 2018 7 79.922 0.267 78.207 0.302 79.065 0.204 2018 8 79.490 0.215 78.085 0.225 78.788 0.155 2018 9 79.181 0.179 77.868 0.377 78.524 0.205 2018 10 79.628 0.237 78.314 0.271 78.971 0.177 2018 11 79.953 0.245 78.251 0.358 79.102 0.218 2018 12 79.651 0.272 78.196 0.327 78.924 0.214 2019 1 79.562 0.519 78.152 0.195 78.857 0.276 2019 2 79.072 0.170 78.278 0.225 78.675 0.139 2019 3 79.779 0.240 78.238 0.317 79.008 0.199 2019 4 79.287 0.207 77.960 0.209 78.623 0.149 2019 5 79.503 0.241 78.220 0.374 78.862 0.226 2019 6 79.279 0.216 77.916 0.260 78.598 0.165 2019 7 79.074 0.163 77.420 0.205 78.247 0.132 2019 8 nan nan nan nan nan nan 2019 9 nan nan nan nan nan nan 2019 10 nan nan nan nan nan nan 2019 11 nan nan nan nan nan nan 2019 12 nan nan nan nan nan nan