19910804 2200291 2403283 2205281 19920804 2405272 1900292 19930804 1900256 19940804 2205272 2204280 278 19950804 1992 Coefficients in use 19910904 2205305 2436273 19920904 1824300 1934285 2335283 19930904 2334293 1925313 2320323 1925294 19940904 2336278 295 19950904 1992 Coefficients in use 19911004 2235279 2336294 2336317 2326335 2326332 19921004 2226322 2226340 2226306 2226294 19931004 19941004 313 19951004 1992 Coefficients in use