| Year | Count |
|---|---|
| 1914 | 12 |
| 1916 | 10 |
| 1917 | 14 |
| 1921 | 12 |
| 1922 | 10 |
| 1931 | 6 |
| 1932 | 15 |
| 1933 | 20 |
| 1934 | 15 |
| 1935 | 18 |
| 1936 | 18 |
| 1942 | 15 |
| 1945 | 18 |
| 1948 | 15 |
| 1950 | 18 |
| 1956 | 5 |
| 1961 | 5 |
| 1998 | 9 |
| 1999 | 6 |
| 2000 | 5 |
| 2001 | 5 |
| 2003 | 8 |
| 2004 | 7 |
| 2005 | 10 |
| 2007 | 9 |
| 2008 | 10 |
| 2009 | 33 |
| 2010 | 27 |
| 2011 | 38 |
| 2012 | 93 |
| 2013 | 116 |
| 2014 | 158 |
| 2015 | 187 |
| 2016 | 182 |
| 2017 | 172 |
| 2018 | 199 |
| 2019 | 175 |
| 2020 | 231 |
| 2021 | 290 |
| 2022 | 284 |
| 2023 | 199 |
| 2024 | 240 |