| Year | Count |
|---|---|
| 1935 | 5 |
| 1942 | 5 |
| 1943 | 20 |
| 1945 | 7 |
| 1946 | 10 |
| 1947 | 6 |
| 1948 | 7 |
| 1950 | 5 |
| 1951 | 6 |
| 1953 | 13 |
| 1954 | 22 |
| 1955 | 36 |
| 1956 | 17 |
| 1957 | 33 |
| 1958 | 46 |
| 1959 | 56 |
| 1960 | 38 |
| 1961 | 76 |
| 1962 | 65 |
| 1963 | 37 |
| 1964 | 56 |
| 1965 | 80 |
| 1966 | 44 |
| 1967 | 48 |
| 1968 | 42 |
| 1969 | 45 |
| 1970 | 65 |
| 1971 | 69 |
| 1972 | 29 |
| 1973 | 10 |
| 1974 | 15 |