| Year | Count |
|---|---|
| 1989 | 17 |
| 1992 | 5 |
| 1997 | 91 |
| 1998 | 203 |
| 1999 | 156 |
| 2000 | 82 |
| 2001 | 122 |
| 2002 | 96 |
| 2003 | 118 |
| 2004 | 123 |
| 2005 | 48 |
| 2006 | 39 |
| 2007 | 31 |
| 2008 | 42 |
| 2009 | 133 |
| 2010 | 103 |
| 2011 | 108 |
| 2012 | 97 |
| 2013 | 130 |
| 2014 | 119 |
| 2015 | 123 |
| 2016 | 140 |
| 2017 | 177 |
| 2018 | 144 |
| 2019 | 136 |
| 2020 | 201 |
| 2021 | 168 |
| 2022 | 130 |
| 2023 | 138 |
| 2024 | 118 |