| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1980 | 1 | 1 | |||||||||||
| 1979 | 16 | 4 | 6 | 2 | 4 | ||||||||
| 1978 | 36 | 1 | 2 | 5 | 2 | 3 | 4 | 2 | 2 | 4 | 5 | 6 | |
| 1977 | 97 | 10 | 12 | 9 | 14 | 11 | 4 | 8 | 4 | 4 | 4 | 3 | 14 |
| 1976 | 103 | 11 | 9 | 9 | 9 | 7 | 9 | 5 | 12 | 8 | 11 | 5 | 8 |
| 1975 | 154 | 21 | 16 | 11 | 14 | 6 | 8 | 12 | 15 | 11 | 13 | 13 | 14 |
| 1974 | 108 | 18 | 10 | 15 | 6 | 10 | 7 | 13 | 9 | 7 | 6 | 4 | 3 |
| 1973 | 141 | 13 | 7 | 10 | 14 | 14 | 13 | 7 | 8 | 14 | 15 | 15 | 11 |
| 1972 | 126 | 16 | 17 | 24 | 6 | 9 | 8 | 4 | 5 | 11 | 2 | 18 | 6 |
| 1971 | 160 | 14 | 15 | 15 | 9 | 15 | 8 | 10 | 15 | 16 | 14 | 17 | 12 |
| 1970 | 145 | 16 | 12 | 18 | 16 | 13 | 7 | 12 | 7 | 9 | 14 | 12 | 9 |
| 1969 | 131 | 6 | 3 | 13 | 14 | 15 | 11 | 8 | 10 | 14 | 11 | 13 | 13 |
| 1968 | 19 | 1 | 1 | 2 | 4 | 1 | 1 | 1 | 4 | 4 | |||
| 1967 | 24 | 1 | 1 | 1 | 1 | 3 | 4 | 5 | 3 | 4 | 1 | ||
| 1966 | 11 | 5 | 1 | 1 | 1 | 1 | 1 | 1 | |||||
| 1965 | 47 | 5 | 10 | 7 | 4 | 1 | 5 | 10 | 1 | 1 | 3 | ||
| 1964 | 64 | 6 | 4 | 1 | 5 | 8 | 4 | 3 | 7 | 9 | 8 | 7 | 2 |
| 1963 | 117 | 8 | 5 | 7 | 7 | 7 | 10 | 6 | 6 | 10 | 18 | 18 | 15 |
| 1962 | 112 | 12 | 10 | 13 | 3 | 4 | 6 | 16 | 12 | 9 | 8 | 7 | 12 |
| 1961 | 66 | 9 | 5 | 1 | 4 | 6 | 4 | 6 | 12 | 5 | 3 | 3 | 8 |
| 1960 | 177 | 22 | 16 | 16 | 20 | 16 | 4 | 12 | 13 | 9 | 20 | 13 | 16 |
| 1959 | 159 | 6 | 2 | 10 | 17 | 18 | 15 | 11 | 17 | 14 | 17 | 13 | 19 |
| 1958 | 18 | 3 | 1 | 2 | 1 | 1 | 3 | 4 | 1 | 2 | |||
| 1957 | 37 | 4 | 3 | 8 | 4 | 4 | 3 | 2 | 1 | 1 | 2 | 5 | |
| 1956 | 13 | 4 | 2 | 4 | 3 | ||||||||
| 1955 | 23 | 1 | 2 | 4 | 1 | 4 | 3 | 5 | 3 | ||||
| 1954 | 1 | 1 | |||||||||||
| 1953 | 10 | 2 | 1 | 7 | |||||||||
| 1952 | 2 | 1 | 1 | ||||||||||
| 1951 | 9 | 2 | 3 | 1 | 3 | ||||||||
| 1950 | 3 | 1 | 1 | 1 | |||||||||
| 2130 |