| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1987 | 1 | 1 | |||||||||||
| 1986 | 12 | 5 | 3 | 4 | |||||||||
| 1985 | 82 | 13 | 8 | 15 | 1 | 7 | 4 | 7 | 7 | 7 | 5 | 5 | 3 |
| 1984 | 237 | 25 | 26 | 22 | 14 | 10 | 12 | 29 | 27 | 21 | 20 | 17 | 14 |
| 1983 | 134 | 1 | 1 | 6 | 2 | 6 | 14 | 23 | 22 | 27 | 13 | 19 | |
| 1982 | 57 | 6 | 14 | 10 | 17 | 10 | |||||||
| 1981 | 181 | 8 | 12 | 15 | 16 | 13 | 20 | 24 | 23 | 20 | 18 | 10 | 2 |
| 1980 | 74 | 3 | 7 | 3 | 6 | 10 | 10 | 7 | 10 | 12 | 6 | ||
| 1979 | 35 | 8 | 2 | 7 | 2 | 3 | 3 | 1 | 3 | 6 | |||
| 1978 | 30 | 3 | 4 | 1 | 1 | 7 | 5 | 1 | 6 | 2 | |||
| 1977 | 61 | 10 | 15 | 15 | 13 | 1 | 2 | 1 | 2 | 2 | |||
| 1976 | 93 | 1 | 1 | 7 | 10 | 12 | 9 | 11 | 13 | 9 | 8 | 10 | 2 |
| 1975 | 30 | 5 | 5 | 6 | 3 | 4 | 4 | 2 | 1 | ||||
| 1974 | 25 | 3 | 1 | 6 | 1 | 2 | 4 | 3 | 1 | 4 | |||
| 1973 | 19 | 4 | 1 | 3 | 3 | 2 | 1 | 3 | 1 | 1 | |||
| 1972 | 26 | 3 | 1 | 5 | 4 | 3 | 4 | 1 | 2 | 3 | |||
| 1971 | 15 | 3 | 1 | 1 | 1 | 2 | 1 | 2 | 3 | 1 | |||
| 1970 | 42 | 7 | 2 | 3 | 6 | 5 | 1 | 5 | 6 | 4 | 3 | ||
| 1969 | 50 | 9 | 5 | 11 | 4 | 1 | 3 | 4 | 1 | 2 | 3 | 4 | 3 |
| 1968 | 24 | 2 | 1 | 1 | 1 | 2 | 1 | 3 | 4 | 4 | 2 | 3 | |
| 1967 | 11 | 1 | 2 | 2 | 3 | 2 | 1 | ||||||
| 1966 | 45 | 1 | 1 | 1 | 3 | 7 | 12 | 12 | 2 | 3 | 2 | 1 | |
| 1965 | 89 | 5 | 1 | 10 | 12 | 17 | 18 | 14 | 9 | 2 | 1 | ||
| 1964 | 100 | 15 | 6 | 10 | 4 | 11 | 8 | 8 | 8 | 12 | 5 | 4 | 9 |
| 1963 | 75 | 14 | 13 | 8 | 8 | 5 | 8 | 7 | 5 | 1 | 2 | 1 | 3 |
| 1962 | 16 | 2 | 1 | 1 | 4 | 6 | 1 | 1 | |||||
| 1961 | 12 | 2 | 2 | 2 | 4 | 1 | 1 | ||||||
| 1960 | 17 | 4 | 4 | 2 | 2 | 4 | 1 | ||||||
| 1959 | 18 | 3 | 2 | 3 | 3 | 2 | 3 | 1 | 1 | ||||
| 1958 | 42 | 2 | 10 | 4 | 9 | 7 | 4 | 6 | |||||
| 1957 | 12 | 3 | 6 | 2 | 1 | ||||||||
| 1665 |
