| Year | Count |
|---|---|
| 1928 | 10 |
| 1946 | 7 |
| 1948 | 5 |
| 1953 | 8 |
| 1956 | 6 |
| 1957 | 12 |
| 1958 | 14 |
| 1963 | 6 |
| 1969 | 5 |
| 1970 | 5 |
| 1971 | 5 |
| 1974 | 5 |
| 1977 | 12 |
| 1978 | 10 |
| 1982 | 5 |
| 1987 | 11 |
| 1988 | 5 |
| 1991 | 10 |
| 1992 | 17 |
| 1993 | 8 |
| 1994 | 11 |
| 1995 | 11 |
| 1997 | 12 |
| 1998 | 7 |
| 1999 | 5 |
| 2000 | 8 |
| 2001 | 9 |
| 2002 | 9 |
| 2003 | 8 |
| 2005 | 5 |
| 2006 | 5 |
| 2007 | 5 |
| 2009 | 5 |
| 2011 | 7 |
| 2012 | 12 |
| 2014 | 8 |
| 2016 | 18 |
| 2017 | 21 |
| 2019 | 10 |
| 2020 | 10 |
| 2022 | 14 |
| 2023 | 10 |
| 2024 | 10 |