| Year | Count |
|---|---|
| 1916 | 7 |
| 1926 | 6 |
| 1927 | 5 |
| 1940 | 5 |
| 1955 | 5 |
| 1966 | 5 |
| 1970 | 6 |
| 1976 | 5 |
| 1977 | 7 |
| 1978 | 5 |
| 1979 | 7 |
| 1980 | 5 |
| 1981 | 5 |
| 1985 | 7 |
| 1988 | 5 |
| 1997 | 10 |
| 1998 | 9 |
| 1999 | 8 |
| 2000 | 9 |
| 2001 | 13 |
| 2002 | 11 |
| 2003 | 11 |
| 2004 | 13 |
| 2005 | 22 |
| 2006 | 14 |
| 2007 | 18 |
| 2008 | 36 |
| 2009 | 29 |
| 2010 | 21 |
| 2011 | 29 |
| 2012 | 29 |
| 2013 | 28 |
| 2014 | 28 |
| 2015 | 32 |
| 2016 | 54 |
| 2017 | 52 |
| 2018 | 32 |
| 2019 | 36 |
| 2020 | 14 |
| 2021 | 11 |
| 2022 | 17 |
| 2023 | 9 |
| 2024 | 9 |