| Year | Count |
|---|---|
| 1922 | 10 |
| 1964 | 10 |
| 1967 | 10 |
| 1977 | 7 |
| 1980 | 5 |
| 1981 | 5 |
| 1991 | 6 |
| 1993 | 7 |
| 1994 | 23 |
| 1996 | 10 |
| 1998 | 7 |
| 1999 | 9 |
| 2000 | 48 |
| 2001 | 45 |
| 2002 | 55 |
| 2003 | 30 |
| 2004 | 20 |
| 2005 | 58 |
| 2006 | 38 |
| 2007 | 61 |
| 2008 | 87 |
| 2009 | 103 |
| 2010 | 145 |
| 2011 | 162 |
| 2012 | 236 |
| 2013 | 239 |
| 2014 | 355 |
| 2015 | 450 |
| 2016 | 514 |
| 2017 | 480 |
| 2018 | 464 |
| 2019 | 428 |
| 2020 | 329 |
| 2021 | 538 |
| 2022 | 447 |
| 2023 | 420 |
| 2024 | 344 |