| Year | Count |
|---|---|
| 1929 | 10 |
| 1936 | 5 |
| 1941 | 5 |
| 1997 | 11 |
| 1998 | 26 |
| 1999 | 107 |
| 2000 | 83 |
| 2001 | 167 |
| 2002 | 247 |
| 2003 | 312 |
| 2004 | 368 |
| 2005 | 427 |
| 2006 | 535 |
| 2007 | 584 |
| 2008 | 564 |
| 2009 | 702 |
| 2010 | 1,063 |
| 2011 | 1,127 |
| 2012 | 1,203 |
| 2013 | 1,203 |
| 2014 | 1,310 |
| 2015 | 930 |
| 2016 | 876 |
| 2017 | 742 |
| 2018 | 504 |
| 2019 | 442 |
| 2020 | 282 |
| 2021 | 250 |
| 2022 | 154 |
| 2023 | 179 |
| 2024 | 152 |