| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1987 | 2 | 2 | |||||||||||
| 1986 | - | ||||||||||||
| 1985 | 23 | 5 | 4 | 1 | 7 | 2 | 2 | 2 | |||||
| 1984 | 149 | 18 | 17 | 13 | 11 | 9 | 4 | 18 | 19 | 14 | 16 | 3 | 7 |
| 1983 | 169 | 18 | 12 | 17 | 9 | 14 | 15 | 10 | 16 | 15 | 17 | 11 | 15 |
| 1982 | 126 | 13 | 8 | 7 | 16 | 9 | 10 | 14 | 9 | 7 | 13 | 10 | 10 |
| 1981 | 136 | 10 | 13 | 14 | 13 | 12 | 10 | 7 | 9 | 14 | 17 | 10 | 7 |
| 1980 | 164 | 19 | 15 | 12 | 12 | 14 | 12 | 18 | 15 | 10 | 12 | 15 | 10 |
| 1979 | 165 | 15 | 10 | 17 | 16 | 12 | 15 | 13 | 11 | 12 | 15 | 17 | 12 |
| 1978 | 136 | 10 | 9 | 12 | 13 | 10 | 12 | 11 | 9 | 12 | 11 | 13 | 14 |
| 1977 | 103 | 4 | 6 | 12 | 11 | 10 | 7 | 9 | 9 | 6 | 11 | 9 | 9 |
| 1976 | 102 | 8 | 10 | 16 | 8 | 13 | 8 | 9 | 9 | 8 | 6 | 6 | 1 |
| 1975 | 97 | 10 | 16 | 12 | 9 | 2 | 2 | 4 | 2 | 4 | 17 | 12 | 7 |
| 1974 | 121 | 13 | 7 | 10 | 9 | 7 | 8 | 12 | 17 | 11 | 10 | 10 | 7 |
| 1973 | 82 | 10 | 5 | 3 | 8 | 5 | 8 | 5 | 6 | 12 | 6 | 7 | 7 |
| 1972 | 129 | 12 | 14 | 12 | 8 | 10 | 14 | 14 | 10 | 12 | 6 | 10 | 7 |
| 1971 | 81 | 3 | 7 | 9 | 7 | 2 | 4 | 6 | 17 | 6 | 6 | 9 | 5 |
| 1970 | 70 | 8 | 14 | 11 | 7 | 9 | 6 | 5 | 4 | 5 | 1 | ||
| 1969 | 146 | 13 | 14 | 13 | 12 | 14 | 7 | 12 | 12 | 14 | 13 | 16 | 6 |
| 1968 | 167 | 13 | 14 | 20 | 17 | 14 | 13 | 15 | 13 | 17 | 11 | 12 | 8 |
| 1967 | 70 | 14 | 13 | 16 | 5 | 1 | 2 | 1 | 1 | 2 | 2 | 3 | 10 |
| 1966 | 120 | 18 | 15 | 17 | 18 | 22 | 19 | 2 | 2 | 3 | 1 | 2 | 1 |
| 1965 | 217 | 16 | 20 | 23 | 17 | 24 | 17 | 21 | 21 | 21 | 10 | 17 | 10 |
| 1964 | 128 | 15 | 13 | 10 | 5 | 14 | 12 | 12 | 13 | 9 | 8 | 11 | 6 |
| 1963 | 183 | 20 | 18 | 21 | 14 | 14 | 12 | 19 | 16 | 13 | 12 | 16 | 8 |
| 1962 | 20 | 5 | 1 | 2 | 1 | 3 | 4 | 1 | 1 | 1 | 1 | ||
| 1961 | 57 | 4 | 3 | 3 | 3 | 4 | 6 | 3 | 9 | 7 | 5 | 5 | 5 |
| 1960 | 35 | 2 | 6 | 5 | 8 | 4 | 1 | 3 | 2 | 1 | 3 | ||
| 1959 | 18 | 3 | 2 | 4 | 1 | 1 | 1 | 2 | 1 | 2 | 1 | ||
| 1958 | 14 | 2 | 2 | 1 | 1 | 3 | 5 | ||||||
| 1957 | - | ||||||||||||
| 1956 | 5 | 1 | 1 | 1 | 2 | ||||||||
| 1955 | 9 | 6 | 1 | 2 | |||||||||
| 3044 |