| Year | Count |
|---|---|
| 1932 | 5 |
| 1946 | 7 |
| 1951 | 12 |
| 1952 | 5 |
| 1953 | 5 |
| 1957 | 20 |
| 1958 | 5 |
| 1959 | 6 |
| 1960 | 5 |
| 1961 | 12 |
| 1962 | 17 |
| 1963 | 14 |
| 1964 | 19 |
| 1965 | 17 |
| 1966 | 5 |
| 1969 | 5 |
| 1970 | 8 |
| 1971 | 5 |
| 1972 | 16 |
| 1975 | 5 |
| 1976 | 7 |
| 1980 | 6 |
| 1981 | 6 |
| 1985 | 6 |
| 1986 | 6 |
| 1987 | 5 |
| 1996 | 10 |
| 1999 | 5 |
| 2000 | 5 |
| 2001 | 5 |
| 2006 | 10 |
| 2013 | 18 |
| 2016 | 10 |