| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1977 | 31 | 4 | 14 | 13 | |||||||||
| 1976 | 88 | 9 | 13 | 18 | 26 | 22 | |||||||
| 1975 | 212 | 10 | 16 | 14 | 15 | 17 | 22 | 28 | 28 | 25 | 24 | 13 | |
| 1974 | 121 | 13 | 14 | 10 | 7 | 10 | 11 | 14 | 13 | 14 | 12 | 3 | |
| 1973 | 161 | 3 | 15 | 13 | 15 | 25 | 18 | 28 | 22 | 22 | |||
| 1972 | 162 | 4 | 26 | 21 | 24 | 26 | 21 | 14 | 26 | ||||
| 1971 | 143 | 1 | 21 | 24 | 26 | 26 | 23 | 22 | |||||
| 1970 | 51 | 5 | 18 | 15 | 13 | ||||||||
| 1969 | 76 | 4 | 15 | 17 | 12 | 23 | 5 | ||||||
| 1968 | 13 | 3 | 8 | 2 | |||||||||
| 1967 | 140 | 15 | 23 | 26 | 25 | 26 | 25 | ||||||
| 1966 | 195 | 9 | 28 | 23 | 26 | 14 | 30 | 28 | 25 | 12 | |||
| 1965 | 206 | 14 | 29 | 28 | 26 | 30 | 27 | 28 | 24 | ||||
| 1964 | 208 | 2 | 3 | 14 | 29 | 28 | 25 | 29 | 24 | 30 | 19 | 5 | |
| 1963 | 176 | 4 | 5 | 14 | 28 | 23 | 29 | 27 | 28 | 16 | 2 | ||
| 1962 | 177 | 2 | 1 | 12 | 30 | 22 | 21 | 26 | 24 | 20 | 17 | 2 | |
| 1961 | 168 | 4 | 2 | 24 | 28 | 22 | 17 | 27 | 29 | 11 | 2 | 2 | |
| 1960 | 166 | 15 | 25 | 23 | 29 | 29 | 18 | 1 | 17 | 9 | |||
| 1959 | 68 | 10 | 19 | 14 | 17 | 8 | |||||||
| 1958 | 167 | 1 | 24 | 30 | 13 | 24 | 21 | 26 | 19 | 9 | |||
| 1957 | 61 | 4 | 10 | 9 | 1 | 8 | 21 | 8 | |||||
| 2790 |
