| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1987 | 18 | 2 | 3 | 5 | 3 | 5 | |||||||
| 1986 | 13 | 2 | 2 | 1 | 1 | 1 | 4 | 1 | 1 | ||||
| 1985 | 19 | 2 | 3 | 3 | 2 | 2 | 1 | 3 | 1 | 2 | |||
| 1984 | - | ||||||||||||
| 1983 | - | ||||||||||||
| 1982 | - | ||||||||||||
| 1981 | 18 | 4 | 2 | 2 | 1 | 3 | 1 | 1 | 4 | ||||
| 1980 | 32 | 3 | 4 | 4 | 4 | 2 | 3 | 1 | 3 | 4 | 4 | ||
| 1979 | 33 | 4 | 2 | 3 | 3 | 3 | 1 | 3 | 2 | 8 | 1 | 3 | |
| 1978 | 13 | 3 | 2 | 2 | 1 | 1 | 1 | 2 | 1 | ||||
| 1977 | 48 | 7 | 8 | 6 | 9 | 5 | 3 | 2 | 4 | 2 | 1 | 1 | |
| 1976 | 60 | 8 | 7 | 10 | 7 | 1 | 7 | 4 | 2 | 4 | 6 | 4 | |
| 1975 | 99 | 6 | 8 | 8 | 9 | 10 | 9 | 6 | 10 | 5 | 10 | 9 | 9 |
| 1974 | 76 | 9 | 6 | 9 | 7 | 3 | 7 | 6 | 6 | 3 | 6 | 8 | 6 |
| 1973 | 54 | 4 | 7 | 1 | 4 | 3 | 5 | 2 | 3 | 3 | 3 | 8 | 11 |
| 1972 | 47 | 3 | 4 | 4 | 3 | 5 | 2 | 4 | 3 | 10 | 9 | ||
| 1971 | 26 | 5 | 3 | 1 | 1 | 1 | 1 | 2 | 2 | 1 | 1 | 7 | 1 |
| 1970 | 72 | 9 | 10 | 6 | 4 | 7 | 4 | 8 | 5 | 5 | 4 | 5 | 5 |
| 1969 | 101 | 9 | 9 | 8 | 10 | 11 | 12 | 9 | 9 | 4 | 9 | 7 | 4 |
| 1968 | 127 | 12 | 12 | 12 | 7 | 10 | 11 | 11 | 14 | 6 | 15 | 10 | 7 |
| 1967 | 136 | 11 | 11 | 14 | 12 | 15 | 8 | 14 | 9 | 9 | 12 | 13 | 8 |
| 1966 | 151 | 15 | 17 | 13 | 13 | 10 | 13 | 14 | 16 | 8 | 10 | 15 | 7 |
| 1965 | 165 | 16 | 13 | 12 | 16 | 13 | 11 | 17 | 11 | 13 | 17 | 15 | 11 |
| 1964 | 152 | 19 | 19 | 12 | 8 | 11 | 10 | 12 | 10 | 10 | 14 | 15 | 12 |
| 1963 | 183 | 17 | 9 | 13 | 10 | 17 | 23 | 21 | 23 | 15 | 11 | 12 | 12 |
| 1962 | 84 | 12 | 9 | 7 | 6 | 4 | 4 | 4 | 6 | 7 | 7 | 10 | 8 |
| 1961 | 114 | 13 | 10 | 4 | 1 | 3 | 4 | 15 | 15 | 19 | 15 | 15 | |
| 1960 | 197 | 20 | 16 | 19 | 19 | 17 | 17 | 18 | 23 | 13 | 13 | 11 | 11 |
| 1959 | 28 | 1 | 8 | 19 | |||||||||
| 2066 |
