| Year | Count |
|---|---|
| 1997 | 9 |
| 1998 | 25 |
| 1999 | 30 |
| 2000 | 11 |
| 2001 | 36 |
| 2002 | 20 |
| 2003 | 71 |
| 2004 | 59 |
| 2005 | 113 |
| 2006 | 131 |
| 2007 | 220 |
| 2008 | 301 |
| 2009 | 730 |
| 2010 | 976 |
| 2011 | 1,079 |
| 2012 | 1,321 |
| 2013 | 1,957 |
| 2014 | 2,030 |
| 2015 | 6 |
| 2015 | 2,399 |
| 2016 | 2,394 |
| 2017 | 2,115 |
| 2018 | 2,153 |
| 2019 | 1,935 |
| 2020 | 1,467 |
| 2021 | 1,687 |
| 2022 | 1,419 |
| 2023 | 1,241 |
| 2024 | 1,175 |