| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1982 | 1 | 1 | |||||||||||
| 1981 | 4 | 2 | 1 | 1 | |||||||||
| 1980 | 25 | 6 | 2 | 3 | 1 | 3 | 10 | ||||||
| 1979 | - | ||||||||||||
| 1978 | - | ||||||||||||
| 1977 | 51 | 2 | 8 | 12 | 8 | 11 | 6 | 2 | 2 | ||||
| 1976 | 34 | 3 | 3 | 4 | 4 | 5 | 6 | 4 | 5 | ||||
| 1975 | 2 | 2 | |||||||||||
| 1974 | 70 | 20 | 5 | 12 | 10 | 9 | 5 | 4 | 3 | 2 | |||
| 1973 | 117 | 13 | 10 | 12 | 15 | 1 | 13 | 12 | 15 | 9 | 7 | 10 | |
| 1972 | 90 | 1 | 6 | 13 | 16 | 16 | 1 | 7 | 6 | 6 | 5 | 5 | 8 |
| 1971 | 18 | 2 | 4 | 6 | 1 | 2 | 1 | 2 | |||||
| 1970 | 53 | 2 | 1 | 3 | 9 | 12 | 10 | 8 | 8 | ||||
| 1969 | 71 | 9 | 17 | 15 | 13 | 7 | 2 | 3 | 5 | ||||
| 1968 | 147 | 13 | 13 | 21 | 14 | 13 | 6 | 13 | 12 | 13 | 16 | 7 | 6 |
| 1967 | 64 | 4 | 15 | 17 | 5 | 1 | 2 | 1 | 1 | 2 | 3 | 2 | 11 |
| 1966 | 25 | 3 | 1 | 4 | 1 | 2 | 3 | 1 | 8 | 2 | |||
| 1965 | 42 | 1 | 3 | 4 | 2 | 11 | 2 | 1 | 9 | 6 | 3 | ||
| 1964 | 30 | 3 | 2 | 3 | 2 | 2 | 3 | 8 | 1 | 3 | 1 | 1 | 1 |
| 1963 | 15 | 2 | 1 | 1 | 3 | 1 | 1 | 3 | 3 | ||||
| 1962 | 14 | 1 | 1 | 1 | 2 | 1 | 3 | 1 | 3 | 1 | |||
| 1961 | 15 | 2 | 1 | 3 | 1 | 2 | 3 | 2 | 1 | ||||
| 1960 | 3 | 1 | 1 | 1 | |||||||||
| 891 |
