| Year | Count |
|---|---|
| 1915 | 7 |
| 1916 | 6 |
| 1918 | 11 |
| 1919 | 14 |
| 1922 | 12 |
| 1925 | 30 |
| 1926 | 14 |
| 1928 | 6 |
| 1929 | 7 |
| 1934 | 5 |
| 1935 | 10 |
| 2000 | 13 |
| 2001 | 48 |
| 2002 | 5 |
| 2004 | 5 |
| 2005 | 13 |
| 2006 | 34 |
| 2007 | 45 |
| 2008 | 66 |
| 2009 | 41 |
| 2010 | 49 |
| 2011 | 54 |
| 2012 | 67 |
| 2013 | 111 |
| 2014 | 71 |
| 2015 | 99 |
| 2016 | 217 |
| 2017 | 157 |
| 2018 | 190 |
| 2019 | 254 |
| 2020 | 275 |
| 2021 | 479 |
| 2022 | 493 |
| 2023 | 448 |
| 2024 | 506 |