| Year | Count |
|---|---|
| 1942 | 6 |
| 1947 | 8 |
| 1950 | 6 |
| 1951 | 8 |
| 1953 | 5 |
| 1954 | 5 |
| 1959 | 11 |
| 1960 | 11 |
| 1961 | 11 |
| 1962 | 11 |
| 1964 | 12 |
| 1965 | 11 |
| 1966 | 12 |
| 1967 | 11 |
| 1968 | 7 |
| 1969 | 10 |
| 1970 | 10 |
| 1971 | 10 |
| 1972 | 8 |
| 1973 | 6 |
| 1974 | 5 |
| 1975 | 12 |
| 1976 | 6 |
| 1978 | 6 |
| 1979 | 5 |
| 1980 | 10 |
| 1982 | 8 |
| 1983 | 6 |
| 1987 | 5 |
| 1988 | 9 |
| 1990 | 7 |
| 1991 | 9 |
| 1992 | 5 |
| 1996 | 5 |
| 1997 | 5 |
| 2003 | 6 |
| 2017 | 10 |