| Year | Count |
|---|---|
| 1930 | 8 |
| 1947 | 6 |
| 1950 | 6 |
| 1953 | 13 |
| 1954 | 8 |
| 1955 | 6 |
| 1957 | 9 |
| 1958 | 6 |
| 1960 | 5 |
| 1961 | 7 |
| 1962 | 6 |
| 1964 | 5 |
| 1966 | 7 |
| 1970 | 6 |
| 1971 | 8 |
| 1972 | 7 |
| 1973 | 8 |
| 1974 | 6 |
| 1976 | 7 |
| 1978 | 5 |
| 1985 | 6 |
| 1987 | 5 |
| 1990 | 5 |
| 1994 | 8 |
| 1995 | 5 |
| 2000 | 8 |
| 2005 | 6 |
| 2009 | 5 |
| 2011 | 6 |
| 2012 | 6 |
| 2013 | 7 |
| 2014 | 6 |
| 2016 | 14 |
| 2021 | 5 |
| 2023 | 8 |