| Year | Count |
|---|---|
| 1990 | 5 |
| 1991 | 5 |
| 1992 | 5 |
| 1993 | 5 |
| 1996 | 26 |
| 1997 | 6 |
| 1998 | 15 |
| 1999 | 5 |
| 2000 | 17 |
| 2001 | 26 |
| 2002 | 16 |
| 2003 | 10 |
| 2005 | 21 |
| 2006 | 12 |
| 2007 | 37 |
| 2008 | 91 |
| 2009 | 52 |
| 2010 | 54 |
| 2011 | 101 |
| 2012 | 87 |
| 2013 | 130 |
| 2014 | 177 |
| 2015 | 254 |
| 2016 | 212 |
| 2017 | 284 |
| 2018 | 335 |
| 2019 | 339 |
| 2020 | 378 |
| 2021 | 12 |
| 2021 | 489 |
| 2022 | 483 |
| 2023 | 366 |
| 2024 | 284 |