| Year | Count |
|---|---|
| 1932 | 5 |
| 1946 | 5 |
| 1948 | 10 |
| 1949 | 10 |
| 1958 | 10 |
| 1959 | 25 |
| 1961 | 7 |
| 1962 | 16 |
| 1964 | 29 |
| 1965 | 10 |
| 1967 | 6 |
| 1969 | 5 |
| 1973 | 5 |
| 1987 | 5 |
| 1988 | 6 |
| 1990 | 6 |
| 1991 | 5 |
| 1994 | 11 |
| 1995 | 7 |
| 1996 | 5 |
| 1997 | 20 |
| 1999 | 5 |
| 2000 | 5 |
| 2001 | 36 |
| 2004 | 17 |
| 2005 | 7 |
| 2006 | 16 |
| 2007 | 8 |
| 2008 | 22 |
| 2009 | 24 |
| 2010 | 5 |
| 2012 | 21 |
| 2013 | 21 |
| 2014 | 10 |
| 2019 | 5 |
| 2022 | 7 |
| 2023 | 6 |