| Year | Count |
|---|---|
| 1917 | 7 |
| 1918 | 6 |
| 1924 | 12 |
| 1935 | 6 |
| 1936 | 6 |
| 1938 | 5 |
| 1939 | 5 |
| 1941 | 5 |
| 1947 | 7 |
| 1958 | 14 |
| 1962 | 6 |
| 1963 | 5 |
| 1966 | 5 |
| 1971 | 7 |
| 1987 | 5 |
| 1989 | 5 |
| 1993 | 5 |
| 1995 | 8 |
| 1997 | 5 |
| 1999 | 5 |
| 2000 | 8 |
| 2001 | 6 |
| 2002 | 10 |
| 2003 | 10 |
| 2004 | 9 |
| 2005 | 8 |
| 2006 | 10 |
| 2007 | 5 |
| 2008 | 8 |
| 2009 | 8 |
| 2010 | 9 |
| 2011 | 17 |
| 2012 | 11 |
| 2013 | 15 |
| 2014 | 18 |
| 2015 | 51 |
| 2016 | 42 |
| 2017 | 27 |
| 2018 | 15 |
| 2019 | 36 |
| 2020 | 28 |
| 2021 | 20 |
| 2022 | 40 |
| 2023 | 16 |
| 2024 | 34 |