1968 -999 -999 41.9 20.9 20.9 8.4 20.9 71.2 175.8 339.1 401.9 67.2 1969 62.8 50.2 41.8 29.3 25.1 8.3 20.9 75.4 184.2 326.5 414.4 323.0 1970 43.4 42.9 46.2 33.0 29.0 10.5 -999 71.0 176.0 323.0 340.0 67.0 1971 -999 -999 37.7 37.7 29.3 8.4 16.8 75.4 175.8 301.4 393.6 121.4 1972 56.1 36.3 33.5 43.5 21.8 10.7 20.2 80.6 190.3 352.8 462.9 223.8 1973 67.0 41.9 25.1 54.4 25.1 8.4 20.9 75.4 159.1 322.4 414.5 247.0 1974 67.0 67.0 37.7 37.7 16.7 12.6 16.7 62.8 154.9 268.0 376.8 125.6 1975 75.4 37.7 41.8 29.3 20.9 12.6 20.9 75.4 175.8 326.6 439.6 175.8 1976 62.8 37.7 -999 20.9 20.9 8.4 20.9 75.4 209.3 343.3 414.5 175.8 1977 75.4 33.5 25.1 37.7 25.1 12.6 25.1 79.5 201.0 381.0 422.9 360.1 # I II III IV V VI VII VIII IX X XI XII