| Year | Count |
|---|---|
| 1997 | 11 |
| 1998 | 55 |
| 1999 | 103 |
| 2000 | 90 |
| 2001 | 114 |
| 2002 | 127 |
| 2003 | 160 |
| 2004 | 281 |
| 2005 | 326 |
| 2006 | 342 |
| 2007 | 370 |
| 2008 | 599 |
| 2009 | 786 |
| 2010 | 1,614 |
| 2011 | 2,203 |
| 2012 | 2,324 |
| 2013 | 1,956 |
| 2014 | 1,965 |
| 2015 | 1,830 |
| 2016 | 1,587 |
| 2017 | 1,299 |
| 2018 | 1,150 |
| 2019 | 957 |
| 2020 | 867 |
| 2021 | 750 |
| 2022 | 743 |
| 2023 | 592 |
| 2024 | 575 |