| Year | Count |
|---|---|
| 1945 | 5 |
| 1949 | 11 |
| 1950 | 10 |
| 1952 | 29 |
| 1953 | 6 |
| 1956 | 21 |
| 1957 | 13 |
| 1958 | 6 |
| 1958 | 5 |
| 1959 | 5 |
| 1960 | 9 |
| 1961 | 8 |
| 1962 | 5 |
| 1963 | 7 |
| 1964 | 5 |
| 1965 | 8 |
| 1966 | 10 |
| 1967 | 9 |
| 1968 | 7 |
| 1969 | 5 |
| 1970 | 8 |
| 1971 | 34 |
| 1971 | 12 |
| 1972 | 14 |
| 1973 | 9 |
| 1975 | 5 |
| 1977 | 12 |
| 1978 | 15 |
| 1979 | 12 |
| 1980 | 10 |
| 1983 | 5 |
| 1987 | 14 |
| 1988 | 10 |