| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1991 | 5 | 2 | 2 | 1 | |||||||||
| 1990 | 2 | 1 | 1 | ||||||||||
| 1989 | 11 | 1 | 1 | 1 | 3 | 3 | 1 | 1 | |||||
| 1988 | 4 | 1 | 1 | 2 | |||||||||
| 1987 | 17 | 3 | 4 | 2 | 2 | 5 | 1 | ||||||
| 1986 | 46 | 9 | 4 | 1 | 3 | 7 | 5 | 1 | 2 | 4 | 5 | 2 | 3 |
| 1985 | 91 | 5 | 4 | 6 | 7 | 10 | 13 | 15 | 8 | 8 | 7 | 8 | |
| 1984 | 39 | 1 | 6 | 7 | 9 | 3 | 5 | 8 | |||||
| 1983 | - | ||||||||||||
| 1982 | 68 | 18 | 13 | 10 | 14 | 13 | |||||||
| 1981 | 197 | 22 | 7 | 21 | 18 | 15 | 12 | 16 | 25 | 14 | 17 | 24 | 6 |
| 1980 | 133 | 1 | 3 | 7 | 7 | 4 | 8 | 17 | 10 | 22 | 13 | 16 | 25 |
| 1979 | 48 | 4 | 2 | 4 | 1 | 1 | 5 | 5 | 4 | 6 | 3 | 13 | |
| 1978 | 77 | 11 | 11 | 10 | 8 | 6 | 1 | 7 | 6 | 6 | 4 | 3 | 4 |
| 1977 | 83 | 6 | 3 | 9 | 6 | 3 | 3 | 1 | 9 | 12 | 13 | 9 | 9 |
| 1976 | 49 | 4 | 5 | 4 | 4 | 3 | 9 | 8 | 4 | 2 | 6 | ||
| 1975 | 87 | 10 | 6 | 11 | 11 | 7 | 7 | 7 | 4 | 7 | 2 | 8 | 7 |
| 1974 | 71 | 4 | 7 | 7 | 8 | 2 | 3 | 6 | 4 | 5 | 8 | 7 | 10 |
| 1973 | 41 | 2 | 4 | 8 | 4 | 2 | 8 | 9 | 4 | ||||
| 1972 | 47 | 2 | 1 | 3 | 4 | 3 | 1 | 5 | 2 | 8 | 9 | 9 | |
| 1971 | 28 | 3 | 1 | 1 | 5 | 3 | 2 | 3 | 3 | 5 | 1 | 1 | |
| 1970 | 10 | 2 | 1 | 1 | 1 | 1 | 2 | 2 | |||||
| 1969 | 33 | 2 | 1 | 6 | 9 | 2 | 4 | 5 | 4 | ||||
| 1968 | 88 | 11 | 5 | 8 | 6 | 9 | 10 | 11 | 10 | 5 | 3 | 4 | 6 |
| 1967 | 40 | 7 | 3 | 3 | 2 | 1 | 3 | 1 | 1 | 2 | 1 | 4 | 12 |
| 1966 | 61 | 9 | 6 | 6 | 3 | 5 | 8 | 5 | 10 | 3 | 2 | 4 | |
| 1965 | 69 | 1 | 1 | 3 | 4 | 9 | 13 | 6 | 13 | 11 | 8 | ||
| 1964 | 83 | 1 | 5 | 1 | 3 | 13 | 8 | 14 | 13 | 13 | 12 | ||
| 1963 | 40 | 19 | 3 | 6 | 3 | 1 | 3 | 3 | 2 | ||||
| 1962 | 19 | 4 | 6 | 3 | 1 | 1 | 1 | 2 | 1 | ||||
| 1961 | 15 | 1 | 1 | 1 | 2 | 2 | 5 | 3 | |||||
| 1960 | 44 | 4 | 5 | 14 | 11 | 1 | 4 | 5 | |||||
| 1646 |
