| Year | Count |
|---|---|
| 1916 | 5 |
| 1918 | 5 |
| 1920 | 6 |
| 1922 | 10 |
| 1930 | 5 |
| 1931 | 7 |
| 1935 | 10 |
| 1942 | 10 |
| 1993 | 5 |
| 1995 | 6 |
| 1996 | 10 |
| 1997 | 17 |
| 1998 | 25 |
| 1999 | 36 |
| 2000 | 40 |
| 2001 | 51 |
| 2002 | 59 |
| 2003 | 113 |
| 2004 | 101 |
| 2005 | 67 |
| 2006 | 72 |
| 2007 | 57 |
| 2008 | 150 |
| 2009 | 124 |
| 2010 | 194 |
| 2011 | 228 |
| 2012 | 359 |
| 2013 | 264 |
| 2014 | 301 |
| 2015 | 313 |
| 2016 | 316 |
| 2017 | 324 |
| 2018 | 287 |
| 2019 | 276 |
| 2020 | 274 |
| 2021 | 210 |
| 2022 | 184 |
| 2023 | 126 |
| 2024 | 172 |