| Year | Total | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1964 | 13 | 5 | 1 | 1 | 5 | 1 | |||||||
| 1963 | 8 | 4 | 4 | ||||||||||
| 1962 | 19 | 14 | 5 | ||||||||||
| 1961 | 76 | 14 | 15 | 16 | 16 | 12 | 2 | 1 | |||||
| 1960 | 46 | 1 | 1 | 1 | 5 | 6 | 6 | 8 | 5 | 4 | 5 | 4 | |
| 1959 | 21 | 2 | 4 | 3 | 4 | 2 | 4 | 2 | |||||
| 1958 | 48 | 7 | 6 | 10 | 2 | 1 | 5 | 3 | 3 | 5 | 1 | 3 | 2 |
| 1957 | 46 | 10 | 7 | 1 | 1 | 3 | 4 | 6 | 2 | 2 | 3 | 4 | 3 |
| 1956 | 39 | 3 | 6 | 1 | 3 | 2 | 6 | 3 | 2 | 4 | 4 | 5 | |
| 1955 | 74 | 11 | 7 | 2 | 5 | 4 | 5 | 4 | 3 | 1 | 8 | 11 | 13 |
| 1954 | 21 | 6 | 1 | 1 | 3 | 8 | 2 | ||||||
| 1953 | 48 | 3 | 4 | 6 | 3 | 2 | 1 | 1 | 8 | 8 | 8 | 4 | |
| 1952 | 9 | 1 | 2 | 3 | 1 | 2 | |||||||
| 1951 | 53 | 5 | 9 | 11 | 7 | 3 | 3 | 1 | 2 | 3 | 3 | 4 | 2 |
| 1950 | 14 | 1 | 2 | 2 | 1 | 2 | 4 | 2 | |||||
| 1949 | 15 | 2 | 3 | 3 | 2 | 2 | 2 | 1 | |||||
| 550 |