| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1980 | 2 | 1 | 1 | ||||||||||
| 1979 | - | ||||||||||||
| 1978 | - | ||||||||||||
| 1977 | - | ||||||||||||
| 1976 | - | ||||||||||||
| 1975 | 35 | 6 | 3 | 10 | 5 | 5 | 5 | 1 | |||||
| 1974 | 17 | 2 | 8 | 1 | 1 | 1 | 4 | ||||||
| 1973 | 32 | 1 | 1 | 3 | 1 | 3 | 6 | 3 | 7 | 5 | 2 | ||
| 1972 | 46 | 2 | 7 | 6 | 1 | 14 | 9 | 7 | |||||
| 1971 | 123 | 4 | 2 | 7 | 7 | 17 | 17 | 19 | 24 | 13 | 9 | 4 | |
| 1970 | 26 | 6 | 12 | 1 | 1 | 1 | 2 | 3 | |||||
| 1969 | 65 | 14 | 15 | 11 | 12 | 9 | 1 | 2 | 1 | ||||
| 1968 | 47 | 1 | 2 | 6 | 2 | 6 | 6 | 4 | 4 | 3 | 4 | 4 | 5 |
| 1967 | 38 | 2 | 2 | 5 | 2 | 6 | 3 | 4 | 6 | 5 | 3 | ||
| 1966 | 33 | 3 | 2 | 7 | 2 | 4 | 1 | 3 | 6 | 3 | 2 | ||
| 1965 | 123 | 20 | 17 | 18 | 7 | 3 | 21 | 9 | 6 | 17 | 4 | 1 | |
| 1964 | 77 | 3 | 6 | 7 | 7 | 7 | 5 | 11 | 17 | 6 | 8 | ||
| 1963 | 41 | 8 | 1 | 1 | 1 | 6 | 4 | 3 | 1 | 3 | 5 | 3 | 5 |
| 1962 | 64 | 6 | 3 | 8 | 6 | 5 | 6 | 5 | 7 | 2 | 8 | 3 | 5 |
| 1961 | 33 | 4 | 2 | 1 | 1 | 5 | 6 | 6 | 6 | 2 | |||
| 1960 | 12 | 3 | 1 | 3 | 2 | 1 | 2 | ||||||
| 1959 | 67 | 1 | 6 | 7 | 12 | 16 | 5 | 9 | 1 | 1 | 5 | 4 | |
| 881 |
