1968 -999 -999 210.6 79.5 29.3 8.4 25.1 83.7 209.3 435.4 595.8 611.2 1969 439.6 267.9 196.8 92.1 33.5 8.4 25.1 83.7 209.3 380.9 502.3 616.0 1970 498.6 321.3 216.0 100.2 39.0 14.9 21.0 88.0 218.0 411.0 520.0 561.0 1971 -999 -999 171.6 87.9 37.7 16.7 20.9 83.7 200.9 347.5 544.2 615.4 1972 463.3 266.7 183.1 88.4 32.7 14.7 24.1 92.8 217.8 416.6 551.4 597.1 1973 527.5 326.5 171.6 96.3 29.3 12.6 25.1 96.3 196.8 389.3 581.9 623.7 1974 471.0 300.0 185.2 87.9 37.7 16.7 25.1 87.9 209.3 352.1 514.9 556.8 1975 510.7 234.4 192.6 83.7 33.5 15.3 27.0 94.1 213.5 406.1 602.8 573.5 1976 494.0 263.7 192.6 79.5 29.3 12.6 20.9 83.7 238.6 406.1 527.5 569.3 1977 514.9 263.7 209.3 87.9 33.5 12.6 29.3 92.1 242.8 452.1 519.1 548.4 1978 419.0 331.0 172.0 84.0 25.0 13.0 25.0 88.0 222.0 436.0 591.0 574.0 1979 507.0 289.0 201.0 92.0 38.0 12.0 25.0 88.0 214.0 406.0 540.0 528.0 1980 408.5 251.2 225.6 105.0 29.4 12.9 27.2 89.3 236.5 490.5 594.1 602.9 1981 489.0 343.5 208.3 79.3 28.8 11.8 25.8 91.4 218.0 400.9 -999 -999 1982 444.9 295.1 189.6 82.9 23.7 10.7 22.8 90.2 226.4 418.5 563.7 551.4 1983 482.5 408.8 193.8 103.6 26.2 6.7 14.9 75.9 189.4 328.3 492.3 574.8 1984 508.9 291.7 174.6 75.1 33.5 13.8 26.6 85.9 199.5 403.9 520.3 619.2 1985 447.2 277.4 204.2 97.1 30.7 9.8 18.9 68.1 174.8 424.0 496.4 612.5 1986 495.9 316.0 166.4 79.6 33.5 9.2 22.3 71.1 218.5 402.0 500.3 615.1 1987 577.7 333.1 216.0 79.9 30.5 10.9 26.7 90.0 231.8 435.9 575.7 542.3 1988 498.4 356.0 169.6 87.5 36.1 13.2 29.2 95.8 225.7 430.0 563.8 641.0 1989 510.0 288.8 194.5 89.2 29.4 11.3 21.2 67.6 184.1 357.7 504.8 537.0 1990 436.0 288.0 215.0 101.0 42.0 13.0 23.0 82.0 212.0 429.0 517.0 616.0 1991 444.1 330.3 204.3 90.5 37.8 14.8 30.1 96.8 247.0 415.2 541.9 547.7 1992 370.4 309.2 171.3 66.3 34.8 14.2 26.7 88.0 200.3 356.0 498.5 489.0 1993 463.3 288.8 224.0 85.6 25.1 11.9 21.7 76.4 203.6 414.0 500.0 600.2 1994 477.4 292.4 227.8 93.9 41.6 9.6 25.0 87.9 209.1 402.5 534.2 559.9 1995 448.3 339.5 233.7 80.3 30.0 12.9 24.1 100.7 235.2 437.1 536.4 510.9 1996 489.9 358.8 194.1 98.4 27.2 12.2 20.8 60.0 161.6 387.2 507.7 519.1 1997 500.7 282.7 213.3 88.3 31.5 12.2 19.0 67.8 233.1 393.4 454.0 634.2 1998 508.7 288.2 235.4 -999 -999 -999 -999 -999 -999 -999 -999 -999 1999 -999 -999 252.2 97.9 39.3 13.0 24.2 93.9 255.4 -999 -999 -999 2000 -999 -999 -999 105.7 34.5 13.9 32.4 102.6 205.1 394.2 522.9 555.4 2001 449.0 289.0 248.0 87.0 26.0 18.0 18.0 58.0 185.0 328.0 470.0 559.0 2002 445.0 289.0 172.0 28.0 28.0 13.4 23.6 80.9 176.3 328.0 554.0 532.0 2003 540.7 270.2 216.0 80.6 26.7 11.4 22.4 70.5 194.6 367.6 538.7 621.1 2004 517.3 303.1 201.5 84.1 27.7 10.9 21.8 75.6 190.4 414.7 502.1 524.6 2005 366.3 276.0 182.2 87.3 30.1 13.3 22.5 89.9 198.1 384.3 549.3 609.0 2006 509.0 268.5 178.7 89.3 24.5 9.2 22.9 -999 -999 -999 456.5 -999 2007 -999 314.9 223.8 85.7 -999 -999 22.3 80.7 208.0 329.9 489.1 608.6 2008 410.7 336.5 184.1 -999 27.1 10.7 -999 77.8 196.4 -999 427.4 -999 2009 372.5 278.8 181.4 -999 -999 -999 -999 89.3 206.9 -999 458.0 506.4 2013 411.1 289.1 208.4 74.6 26.7 10.3 21.0 88.8 227.4 317.6 565.0 661.6 2014 -999 271.2 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 2015 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 2016 -999 -999 -999 -999 -999 -999 22.5 88.0 -999 -999 -999 -999 2017 -999 270.5 -999 -999 -999 -999 -999 -999 -999 -999 -999 -999 # I II III IV V VI VII VIII IX X XI XII