| Year | Count |
|---|---|
| 1934 | 6 |
| 1958 | 10 |
| 1991 | 5 |
| 1992 | 5 |
| 1995 | 5 |
| 1996 | 12 |
| 1997 | 5 |
| 1998 | 6 |
| 1999 | 5 |
| 2000 | 10 |
| 2001 | 6 |
| 2002 | 5 |
| 2003 | 9 |
| 2004 | 12 |
| 2005 | 18 |
| 2006 | 23 |
| 2007 | 12 |
| 2008 | 15 |
| 2009 | 9 |
| 2010 | 11 |
| 2011 | 12 |
| 2012 | 14 |
| 2013 | 12 |
| 2014 | 10 |
| 2015 | 33 |
| 2016 | 36 |
| 2017 | 33 |
| 2018 | 16 |
| 2019 | 16 |
| 2020 | 14 |
| 2022 | 26 |
| 2024 | 18 |