| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1967 | 3 | 1 | 1 | 1 | |||||||||
| 1966 | 25 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 1 | 2 | 1 | 1 |
| 1965 | 60 | 7 | 10 | 12 | 3 | 3 | 3 | 7 | 3 | 5 | 2 | 4 | 1 |
| 1964 | 43 | 3 | 7 | 15 | 2 | 1 | 4 | 3 | 2 | 4 | 2 | ||
| 1963 | 48 | 6 | 13 | 6 | 4 | 4 | 3 | 4 | 1 | 3 | 1 | 2 | 1 |
| 1962 | 76 | 10 | 13 | 10 | 13 | 20 | 1 | 2 | 1 | 1 | 4 | 1 | |
| 1961 | 20 | 3 | 3 | 2 | 1 | 3 | 8 | ||||||
| 1960 | 11 | 2 | 3 | 1 | 2 | 2 | 1 | ||||||
| 1959 | 107 | 6 | 11 | 12 | 11 | 12 | 10 | 10 | 9 | 10 | 5 | 7 | 4 |
| 1958 | 21 | 5 | 2 | 9 | 5 | ||||||||
| 1957 | 14 | 4 | 5 | 3 | 1 | 1 | |||||||
| 1956 | 37 | 6 | 7 | 8 | 1 | 1 | 1 | 7 | 5 | 1 | |||
| 1955 | 25 | 3 | 2 | 1 | 1 | 3 | 2 | 7 | 6 | ||||
| 1954 | 54 | 1 | 2 | 3 | 7 | 8 | 6 | 1 | 2 | 5 | 6 | 7 | 6 |
| 1953 | 79 | 5 | 3 | 6 | 4 | 5 | 6 | 11 | 6 | 4 | 11 | 11 | 7 |
| 1952 | 52 | 1 | 4 | 8 | 8 | 8 | 6 | 9 | 5 | 3 | |||
| 1951 | 4 | 1 | 1 | 1 | 1 | ||||||||
| 679 |
