| Year | Count |
|---|---|
| 1915 | 8 |
| 1916 | 6 |
| 1917 | 6 |
| 1918 | 5 |
| 1919 | 5 |
| 1920 | 5 |
| 1925 | 7 |
| 1929 | 6 |
| 1931 | 9 |
| 1933 | 5 |
| 1943 | 6 |
| 1951 | 5 |
| 1958 | 5 |
| 1990 | 5 |
| 1996 | 6 |
| 1997 | 9 |
| 1999 | 5 |
| 2000 | 11 |
| 2001 | 7 |
| 2003 | 6 |
| 2004 | 8 |
| 2005 | 9 |
| 2006 | 9 |
| 2007 | 10 |
| 2008 | 5 |
| 2009 | 9 |
| 2011 | 8 |
| 2012 | 9 |
| 2013 | 5 |
| 2014 | 8 |
| 2015 | 14 |
| 2016 | 10 |
| 2017 | 10 |
| 2019 | 6 |
| 2024 | 5 |