| Year | Count |
|---|---|
| 1998 | 7 |
| 1999 | 17 |
| 2000 | 6 |
| 2000 | 25 |
| 2001 | 14 |
| 2001 | 40 |
| 2002 | 22 |
| 2002 | 80 |
| 2003 | 26 |
| 2003 | 98 |
| 2004 | 27 |
| 2004 | 121 |
| 2005 | 22 |
| 2005 | 155 |
| 2006 | 18 |
| 2006 | 186 |
| 2007 | 25 |
| 2007 | 174 |
| 2008 | 20 |
| 2008 | 187 |
| 2009 | 28 |
| 2009 | 178 |
| 2010 | 12 |
| 2010 | 189 |
| 2011 | 8 |
| 2011 | 151 |
| 2012 | 8 |
| 2012 | 114 |
| 2013 | 98 |
| 2014 | 101 |
| 2015 | 78 |
| 2016 | 150 |
| 2017 | 114 |
| 2018 | 112 |
| 2019 | 94 |
| 2020 | 41 |
| 2021 | 55 |
| 2022 | 32 |
| 2023 | 28 |
| 2024 | 39 |