| Year | Count |
|---|---|
| 1990 | 6 |
| 1994 | 15 |
| 1995 | 5 |
| 1997 | 5 |
| 1998 | 9 |
| 1999 | 6 |
| 2000 | 7 |
| 2002 | 5 |
| 2003 | 26 |
| 2004 | 16 |
| 2005 | 44 |
| 2006 | 42 |
| 2007 | 30 |
| 2008 | 52 |
| 2009 | 71 |
| 2010 | 65 |
| 2011 | 75 |
| 2012 | 78 |
| 2013 | 107 |
| 2014 | 66 |
| 2015 | 134 |
| 2016 | 91 |
| 2017 | 108 |
| 2018 | 101 |
| 2019 | 88 |
| 2020 | 57 |
| 2021 | 156 |
| 2022 | 159 |
| 2023 | 170 |
| 2024 | 126 |