| Year | Count |
|---|---|
| 1992 | 7 |
| 1994 | 8 |
| 1996 | 10 |
| 1997 | 11 |
| 1998 | 21 |
| 1999 | 18 |
| 2000 | 24 |
| 2001 | 30 |
| 2002 | 19 |
| 2003 | 37 |
| 2004 | 48 |
| 2005 | 47 |
| 2006 | 54 |
| 2007 | 52 |
| 2008 | 67 |
| 2009 | 64 |
| 2010 | 66 |
| 2011 | 70 |
| 2012 | 52 |
| 2013 | 53 |
| 2014 | 40 |
| 2015 | 50 |
| 2016 | 102 |
| 2017 | 126 |
| 2018 | 47 |
| 2019 | 90 |
| 2020 | 70 |
| 2021 | 56 |
| 2022 | 24 |
| 2023 | 16 |
| 2024 | 22 |