| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1996 | 3 | 3 | |||||||||||
| 1995 | 23 | 1 | 11 | 4 | 7 | ||||||||
| 1994 | - | ||||||||||||
| 1993 | - | ||||||||||||
| 1992 | 1 | 1 | |||||||||||
| 1991 | 1 | 1 | |||||||||||
| 1990 | 121 | 18 | 2 | 5 | 8 | 11 | 17 | 10 | 15 | 14 | 11 | 10 | |
| 1989 | 71 | 17 | 3 | 3 | 1 | 1 | 1 | 3 | 11 | 8 | 20 | 2 | 1 |
| 1988 | 43 | 23 | 1 | 1 | 6 | 9 | 1 | 2 | |||||
| 1987 | 78 | 17 | 7 | 7 | 5 | 4 | 6 | 9 | 10 | 11 | 1 | 1 | |
| 1986 | 88 | 13 | 7 | 9 | 7 | 6 | 5 | 8 | 10 | 7 | 6 | 7 | 3 |
| 1985 | 149 | 24 | 10 | 17 | 20 | 18 | 13 | 25 | 3 | 6 | 5 | 6 | 2 |
| 1984 | 79 | 2 | 6 | 10 | 8 | 10 | 17 | 3 | 2 | 13 | 1 | 7 | |
| 1983 | 53 | 17 | 1 | 7 | 11 | 2 | 3 | 6 | 4 | 2 | |||
| 1982 | 148 | 15 | 4 | 12 | 19 | 15 | 10 | 15 | 5 | 12 | 25 | 6 | 10 |
| 1981 | 170 | 18 | 17 | 7 | 27 | 7 | 10 | 21 | 12 | 6 | 25 | 8 | 12 |
| 1980 | 24 | 1 | 6 | 7 | 8 | 2 | |||||||
| 1979 | 77 | 7 | 6 | 7 | 8 | 4 | 11 | 6 | 13 | 11 | 4 | ||
| 1978 | 76 | 6 | 4 | 8 | 11 | 6 | 10 | 9 | 4 | 1 | 6 | 7 | 4 |
| 1977 | 74 | 6 | 9 | 1 | 3 | 12 | 7 | 4 | 7 | 7 | 3 | 9 | 6 |
| 1976 | 88 | 13 | 10 | 7 | 4 | 11 | 6 | 1 | 3 | 4 | 14 | 9 | 6 |
| 1975 | 122 | 11 | 6 | 10 | 14 | 16 | 11 | 4 | 5 | 8 | 17 | 10 | 10 |
| 1974 | 162 | 18 | 5 | 15 | 8 | 18 | 15 | 20 | 15 | 10 | 17 | 12 | 9 |
| 1973 | 140 | 13 | 12 | 9 | 15 | 14 | 10 | 16 | 10 | 7 | 20 | 10 | 4 |
| 1972 | 37 | 3 | 3 | 9 | 7 | 15 | |||||||
| 1971 | 13 | 4 | 4 | 1 | 4 | ||||||||
| 1841 |