| Year | Count |
|---|---|
| 1922 | 6 |
| 1991 | 5 |
| 1993 | 6 |
| 1994 | 11 |
| 1995 | 11 |
| 1996 | 17 |
| 1997 | 23 |
| 1998 | 44 |
| 1999 | 38 |
| 2000 | 60 |
| 2001 | 55 |
| 2002 | 26 |
| 2003 | 10 |
| 2003 | 92 |
| 2004 | 5 |
| 2004 | 68 |
| 2005 | 76 |
| 2006 | 5 |
| 2006 | 72 |
| 2007 | 12 |
| 2007 | 80 |
| 2008 | 6 |
| 2008 | 115 |
| 2009 | 10 |
| 2009 | 101 |
| 2010 | 20 |
| 2010 | 120 |
| 2011 | 29 |
| 2011 | 121 |
| 2012 | 28 |
| 2012 | 202 |
| 2013 | 55 |
| 2013 | 176 |
| 2014 | 81 |
| 2014 | 182 |
| 2015 | 220 |
| 2015 | 335 |
| 2016 | 208 |
| 2016 | 512 |
| 2017 | 157 |
| 2017 | 428 |
| 2018 | 148 |
| 2018 | 448 |
| 2019 | 176 |
| 2019 | 605 |
| 2020 | 248 |
| 2020 | 802 |
| 2021 | 351 |
| 2021 | 1,142 |
| 2022 | 417 |
| 2022 | 1,047 |
| 2023 | 447 |
| 2023 | 991 |
| 2024 | 440 |
| 2024 | 1,045 |