| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1968 | 57 | 1 | 10 | 25 | 18 | 3 | |||||||
| 1967 | 70 | 4 | 3 | 6 | 1 | 3 | 3 | 9 | 25 | 16 | |||
| 1966 | 55 | 1 | 3 | 5 | 3 | 14 | 12 | 7 | 5 | 1 | 2 | 2 | |
| 1965 | 1 | 1 | |||||||||||
| 1964 | 16 | 1 | 1 | 2 | 1 | 1 | 2 | 2 | 3 | 1 | 2 | ||
| 1963 | 14 | 1 | 2 | 1 | 5 | 2 | 1 | 2 | |||||
| 1962 | 9 | 5 | 4 | ||||||||||
| 1961 | 86 | 2 | 1 | 8 | 20 | 23 | 20 | 8 | 3 | 1 | |||
| 1960 | 40 | 5 | 8 | 12 | 3 | 5 | 1 | 3 | 2 | 1 | |||
| 1959 | 144 | 10 | 16 | 16 | 9 | 8 | 19 | 17 | 24 | 16 | 7 | 2 | |
| 1958 | 61 | 5 | 4 | 6 | 3 | 4 | 5 | 10 | 14 | 10 | |||
| 1957 | 30 | 3 | 3 | 6 | 6 | 2 | 2 | 3 | 2 | 3 | |||
| 1956 | 33 | 5 | 5 | 4 | 1 | 5 | 1 | 7 | 5 | ||||
| 1955 | 37 | 6 | 4 | 4 | 3 | 5 | 2 | 3 | 1 | 4 | 5 | ||
| 1954 | 71 | 4 | 11 | 13 | 12 | 2 | 8 | 6 | 4 | 3 | 4 | 4 | |
| 1953 | 25 | 14 | 4 | 1 | 4 | 1 | 1 | ||||||
| 1952 | 48 | 3 | 7 | 5 | 5 | 7 | 6 | 3 | 3 | 3 | 3 | 3 | |
| 1951 | 64 | 7 | 3 | 3 | 5 | 5 | 8 | 6 | 7 | 4 | 3 | 7 | 6 |
| 1950 | 29 | 6 | 9 | 2 | 4 | 4 | 4 | ||||||
| 1949 | 12 | 1 | 1 | 2 | 1 | 2 | 2 | 2 | 1 | ||||
| 1948 | 5 | 2 | 3 | ||||||||||
| 1947 | 1 | 1 | |||||||||||
| 908 |
