| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1988 | 2 | 1 | 1 | ||||||||||
| 1987 | 85 | 26 | 5 | 3 | 5 | 8 | 3 | 6 | 15 | 12 | 1 | 1 | |
| 1986 | 55 | 6 | 5 | 8 | 6 | 5 | 1 | 4 | 2 | 4 | 4 | 4 | 6 |
| 1985 | 3 | 3 | |||||||||||
| 1984 | - | ||||||||||||
| 1983 | 3 | 1 | 2 | ||||||||||
| 1982 | - | ||||||||||||
| 1981 | - | ||||||||||||
| 1980 | - | ||||||||||||
| 1979 | 4 | 2 | 2 | ||||||||||
| 1978 | 50 | 2 | 2 | 1 | 11 | 9 | 3 | 7 | 5 | 5 | 5 | ||
| 1977 | 50 | 1 | 4 | 2 | 6 | 6 | 2 | 7 | 12 | 8 | 2 | ||
| 1976 | 20 | 1 | 1 | 1 | 4 | 2 | 3 | 5 | 3 | ||||
| 1975 | 51 | 10 | 7 | 12 | 2 | 1 | 2 | 4 | 7 | 3 | 1 | 2 | |
| 1974 | 83 | 13 | 7 | 14 | 9 | 8 | 7 | 12 | 5 | 5 | 3 | ||
| 1973 | 77 | 4 | 5 | 1 | 9 | 7 | 11 | 6 | 1 | 6 | 7 | 11 | 9 |
| 1972 | 80 | 2 | 1 | 10 | 13 | 11 | 8 | 10 | 10 | 3 | 8 | 4 | |
| 1971 | 42 | 7 | 5 | 4 | 6 | 5 | 5 | 4 | 1 | 3 | 2 | ||
| 1970 | 46 | 7 | 6 | 9 | 9 | 2 | 9 | 3 | 1 | ||||
| 1969 | 144 | 19 | 6 | 3 | 10 | 19 | 13 | 13 | 13 | 10 | 14 | 14 | 10 |
| 1968 | 170 | 14 | 15 | 15 | 14 | 16 | 18 | 14 | 13 | 10 | 18 | 11 | 12 |
| 1967 | 67 | 16 | 15 | 13 | 6 | 1 | 1 | 1 | 2 | 3 | 4 | 5 | |
| 1966 | 107 | 16 | 18 | 14 | 19 | 19 | 16 | 1 | 1 | 1 | 1 | 1 | |
| 1965 | 204 | 6 | 17 | 19 | 20 | 22 | 16 | 19 | 21 | 13 | 19 | 17 | 15 |
| 1964 | 48 | 15 | 10 | 7 | 4 | 5 | 2 | 3 | 1 | 1 | |||
| 1963 | 40 | 5 | 3 | 5 | 5 | 4 | 3 | 3 | 4 | 1 | 2 | 5 | |
| 1962 | 101 | 8 | 19 | 22 | 18 | 10 | 4 | 2 | 3 | 2 | 3 | 10 | |
| 1961 | 23 | 8 | 4 | 1 | 1 | 3 | 6 | ||||||
| 1960 | 96 | 8 | 8 | 5 | 6 | 5 | 9 | 9 | 13 | 9 | 9 | 8 | 7 |
| 1959 | 60 | 4 | 5 | 5 | 6 | 7 | 1 | 6 | 13 | 8 | 5 | ||
| 1958 | 25 | 5 | 5 | 7 | 1 | 2 | 5 | ||||||
| 1957 | 3 | 3 | |||||||||||
| 1956 | 2 | 1 | 1 | ||||||||||
| 1741 |
