| Year | Count |
|---|---|
| 1923 | 15 |
| 1925 | 18 |
| 1987 | 5 |
| 1988 | 6 |
| 1990 | 17 |
| 1991 | 18 |
| 1992 | 5 |
| 1996 | 36 |
| 1997 | 137 |
| 1998 | 188 |
| 1999 | 175 |
| 2000 | 96 |
| 2001 | 114 |
| 2002 | 149 |
| 2003 | 101 |
| 2004 | 113 |
| 2005 | 190 |
| 2006 | 283 |
| 2007 | 322 |
| 2008 | 419 |
| 2009 | 382 |
| 2010 | 420 |
| 2011 | 501 |
| 2012 | 552 |
| 2013 | 647 |
| 2014 | 1,032 |
| 2015 | 1,339 |
| 2016 | 1,681 |
| 2017 | 1,680 |
| 2018 | 1,860 |
| 2019 | 1,878 |
| 2020 | 1,767 |
| 2021 | 1,918 |
| 2022 | 1,680 |
| 2023 | 1,498 |
| 2024 | 1,663 |