| Year | Count |
|---|---|
| 1943 | 5 |
| 1946 | 6 |
| 1947 | 8 |
| 1948 | 11 |
| 1949 | 14 |
| 1950 | 5 |
| 1951 | 25 |
| 1952 | 18 |
| 1953 | 8 |
| 1954 | 15 |
| 1955 | 20 |
| 1956 | 29 |
| 1957 | 50 |
| 1958 | 33 |
| 1959 | 57 |
| 1960 | 63 |
| 1961 | 81 |
| 1962 | 18 |
| 1963 | 41 |
| 1964 | 41 |
| 1965 | 23 |
| 1966 | 21 |
| 1967 | 8 |
| 1968 | 18 |
| 1969 | 5 |
| 1970 | 16 |
| 1971 | 5 |
| 1972 | 5 |
| 1973 | 12 |
| 1974 | 7 |
| 1978 | 10 |
| 1985 | 5 |