| Year | Count |
|---|---|
| 1918 | 5 |
| 1996 | 10 |
| 1997 | 27 |
| 1998 | 31 |
| 1999 | 14 |
| 2000 | 19 |
| 2001 | 59 |
| 2002 | 35 |
| 2003 | 62 |
| 2004 | 166 |
| 2005 | 114 |
| 2006 | 132 |
| 2007 | 162 |
| 2008 | 267 |
| 2009 | 256 |
| 2010 | 280 |
| 2011 | 230 |
| 2012 | 307 |
| 2013 | 262 |
| 2014 | 340 |
| 2015 | 385 |
| 2016 | 415 |
| 2017 | 386 |
| 2018 | 364 |
| 2019 | 381 |
| 2020 | 257 |
| 2021 | 378 |
| 2022 | 288 |
| 2023 | 285 |
| 2024 | 260 |