| Year | Count |
|---|---|
| 1982 | 6 |
| 1989 | 6 |
| 1995 | 6 |
| 1996 | 6 |
| 1998 | 10 |
| 1999 | 7 |
| 2000 | 13 |
| 2001 | 13 |
| 2002 | 15 |
| 2003 | 20 |
| 2004 | 20 |
| 2005 | 23 |
| 2006 | 23 |
| 2007 | 21 |
| 2008 | 21 |
| 2009 | 35 |
| 2010 | 45 |
| 2011 | 83 |
| 2012 | 78 |
| 2013 | 99 |
| 2014 | 102 |
| 2015 | 73 |
| 2016 | 328 |
| 2017 | 402 |
| 2018 | 392 |
| 2019 | 372 |
| 2020 | 195 |
| 2021 | 135 |
| 2022 | 146 |
| 2023 | 121 |
| 2024 | 112 |