| Year | Count |
|---|---|
| 1997 | 14 |
| 1998 | 78 |
| 1999 | 133 |
| 2000 | 234 |
| 2001 | 450 |
| 2002 | 495 |
| 2003 | 657 |
| 2004 | 1,255 |
| 2005 | 1,234 |
| 2006 | 1,240 |
| 2007 | 1,317 |
| 2008 | 1,312 |
| 2009 | 1,061 |
| 2010 | 879 |
| 2011 | 724 |
| 2012 | 566 |
| 2013 | 429 |
| 2014 | 386 |
| 2015 | 380 |
| 2016 | 261 |
| 2017 | 208 |
| 2018 | 198 |
| 2019 | 130 |
| 2020 | 103 |
| 2021 | 152 |
| 2022 | 129 |
| 2023 | 130 |
| 2024 | 116 |