| Year | Count |
|---|---|
| 1914 | 5 |
| 1921 | 12 |
| 1926 | 10 |
| 1933 | 7 |
| 1934 | 6 |
| 1945 | 15 |
| 1990 | 5 |
| 1992 | 11 |
| 1995 | 5 |
| 1997 | 5 |
| 1998 | 22 |
| 1999 | 22 |
| 2000 | 19 |
| 2001 | 9 |
| 2002 | 57 |
| 2003 | 58 |
| 2004 | 5 |
| 2004 | 139 |
| 2005 | 6 |
| 2005 | 304 |
| 2006 | 395 |
| 2007 | 7 |
| 2007 | 382 |
| 2008 | 6 |
| 2008 | 493 |
| 2009 | 6 |
| 2009 | 517 |
| 2010 | 5 |
| 2010 | 490 |
| 2011 | 10 |
| 2011 | 455 |
| 2012 | 8 |
| 2012 | 523 |
| 2013 | 12 |
| 2013 | 502 |
| 2014 | 19 |
| 2014 | 538 |
| 2015 | 6 |
| 2015 | 488 |
| 2016 | 13 |
| 2016 | 489 |
| 2017 | 18 |
| 2017 | 417 |
| 2018 | 13 |
| 2018 | 417 |
| 2019 | 11 |
| 2019 | 496 |
| 2020 | 6 |
| 2020 | 417 |
| 2021 | 7 |
| 2021 | 532 |
| 2022 | 475 |
| 2023 | 7 |
| 2023 | 468 |
| 2024 | 459 |