| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1984 | 6 | 1 | 2 | 3 | |||||||||
| 1983 | 31 | 4 | 3 | 11 | 6 | 2 | 5 | ||||||
| 1982 | 44 | 2 | 2 | 1 | 32 | 7 | |||||||
| 1981 | 51 | 1 | 2 | 6 | 7 | 4 | 1 | 22 | 1 | 3 | 4 | ||
| 1980 | 33 | 5 | 5 | 5 | 13 | 5 | |||||||
| 1979 | 113 | 18 | 16 | 18 | 8 | 27 | 9 | 2 | 1 | 1 | 4 | 9 | |
| 1978 | 104 | 3 | 3 | 7 | 15 | 25 | 16 | 15 | 12 | 8 | |||
| 1977 | 84 | 12 | 7 | 7 | 10 | 23 | 4 | 6 | 2 | 4 | 2 | 4 | 3 |
| 1976 | 58 | 1 | 1 | 24 | 12 | 4 | 3 | 7 | 5 | 1 | |||
| 1975 | 56 | 8 | 7 | 5 | 6 | 10 | 10 | 3 | 1 | 3 | 1 | 2 | |
| 1974 | 67 | 3 | 11 | 9 | 3 | 9 | 4 | 3 | 5 | 9 | 6 | 4 | 1 |
| 1973 | 113 | 13 | 9 | 6 | 8 | 6 | 10 | 8 | 5 | 21 | 10 | 8 | 9 |
| 1972 | 83 | 16 | 18 | 7 | 11 | 8 | 6 | 1 | 2 | 2 | 5 | 7 | |
| 1971 | 58 | 1 | 2 | 2 | 1 | 2 | 1 | 2 | 4 | 10 | 16 | 17 | |
| 1970 | 97 | 6 | 12 | 14 | 11 | 10 | 6 | 10 | 3 | 7 | 8 | 5 | 5 |
| 1969 | 142 | 13 | 12 | 12 | 16 | 16 | 12 | 13 | 11 | 8 | 14 | 7 | 8 |
| 1968 | 124 | 11 | 12 | 15 | 7 | 12 | 15 | 7 | 9 | 9 | 11 | 6 | 10 |
| 1967 | 115 | 3 | 5 | 7 | 6 | 9 | 3 | 16 | 18 | 14 | 12 | 12 | 10 |
| 1966 | 57 | 11 | 5 | 6 | 7 | 3 | 3 | 4 | 5 | 3 | 3 | 4 | 3 |
| 1965 | 71 | 2 | 2 | 1 | 4 | 2 | 2 | 2 | 14 | 17 | 1 | 10 | 14 |
| 1964 | 8 | 2 | 1 | 1 | 4 | ||||||||
| 1515 |
