| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1986 | 21 | 3 | 6 | 4 | 4 | 4 | |||||||
| 1985 | 95 | 20 | 11 | 8 | 12 | 9 | 10 | 3 | 1 | 6 | 4 | 6 | 5 |
| 1984 | 98 | 6 | 7 | 5 | 10 | 5 | 6 | 12 | 12 | 10 | 8 | 5 | 12 |
| 1983 | 51 | 3 | 4 | 7 | 3 | 6 | 2 | 3 | 5 | 6 | 6 | 6 | |
| 1982 | 147 | 14 | 8 | 25 | 22 | 19 | 24 | 24 | 10 | 1 | |||
| 1981 | 20 | 2 | 1 | 1 | 3 | 13 | |||||||
| 1980 | 21 | 1 | 12 | 8 | |||||||||
| 1979 | 31 | 1 | 4 | 6 | 6 | 1 | 5 | 4 | 3 | 1 | |||
| 1978 | 35 | 4 | 3 | 2 | 1 | 5 | 2 | 1 | 2 | 4 | 9 | 2 | |
| 1977 | 61 | 5 | 3 | 5 | 7 | 5 | 4 | 7 | 7 | 4 | 5 | 4 | 5 |
| 1976 | 68 | 7 | 9 | 5 | 5 | 6 | 6 | 6 | 4 | 9 | 8 | 3 | |
| 1975 | 28 | 1 | 6 | 8 | 6 | 2 | 2 | 3 | |||||
| 1974 | 6 | 5 | 1 | ||||||||||
| 1973 | 39 | 4 | 3 | 3 | 2 | 2 | 4 | 7 | 3 | 6 | 5 | ||
| 1972 | 52 | 3 | 1 | 1 | 2 | 1 | 2 | 8 | 19 | 13 | 2 | ||
| 1971 | 7 | 1 | 4 | 2 | |||||||||
| 780 |
