| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1987 | 162 | 26 | 12 | 14 | 18 | 15 | 8 | 23 | 10 | 12 | 20 | 4 | |
| 1986 | 190 | 24 | 9 | 16 | 23 | 17 | 10 | 24 | 14 | 10 | 24 | 9 | 10 |
| 1985 | 211 | 26 | 11 | 17 | 22 | 19 | 16 | 28 | 14 | 15 | 16 | 14 | 13 |
| 1984 | 179 | 21 | 17 | 9 | 23 | 11 | 13 | 22 | 9 | 10 | 23 | 10 | 11 |
| 1983 | 139 | 5 | 7 | 7 | 10 | 21 | 14 | 11 | 11 | 17 | 18 | 16 | 2 |
| 1982 | 124 | 12 | 13 | 14 | 7 | 13 | 8 | 10 | 10 | 12 | 10 | 6 | 9 |
| 1981 | 116 | 11 | 19 | 20 | 11 | 7 | 15 | 17 | 16 | ||||
| 1980 | 2 | 1 | 1 | ||||||||||
| 1979 | 95 | 11 | 24 | 16 | 10 | 13 | 16 | 4 | 1 | ||||
| 1978 | 100 | 11 | 1 | 11 | 4 | 5 | 8 | 16 | 8 | 3 | 15 | 8 | 10 |
| 1977 | 65 | 4 | 6 | 4 | 5 | 9 | 8 | 7 | 5 | 3 | 11 | 3 | |
| 1976 | 111 | 15 | 4 | 8 | 15 | 15 | 11 | 11 | 10 | 8 | 10 | 4 | |
| 1975 | 61 | 1 | 1 | 5 | 5 | 4 | 5 | 4 | 9 | 1 | 15 | 7 | 4 |
| 1555 |
