| Year | Count |
|---|---|
| 1989 | 5 |
| 1993 | 5 |
| 1996 | 7 |
| 1997 | 6 |
| 1999 | 5 |
| 2000 | 15 |
| 2001 | 14 |
| 2002 | 9 |
| 2003 | 15 |
| 2004 | 24 |
| 2005 | 14 |
| 2006 | 19 |
| 2007 | 35 |
| 2008 | 34 |
| 2009 | 39 |
| 2010 | 41 |
| 2011 | 33 |
| 2012 | 43 |
| 2013 | 41 |
| 2014 | 41 |
| 2015 | 39 |
| 2016 | 92 |
| 2017 | 92 |
| 2018 | 138 |
| 2019 | 150 |
| 2020 | 102 |
| 2021 | 160 |
| 2022 | 147 |
| 2023 | 155 |
| 2024 | 202 |