| Year | Count |
|---|---|
| 1991 | 12 |
| 1992 | 19 |
| 1993 | 25 |
| 1994 | 12 |
| 1995 | 23 |
| 1996 | 14 |
| 1998 | 21 |
| 1999 | 33 |
| 2000 | 14 |
| 2001 | 13 |
| 2002 | 25 |
| 2003 | 24 |
| 2004 | 28 |
| 2005 | 38 |
| 2006 | 22 |
| 2007 | 70 |
| 2008 | 47 |
| 2009 | 45 |
| 2010 | 59 |
| 2011 | 49 |
| 2012 | 50 |
| 2013 | 63 |
| 2014 | 93 |
| 2015 | 124 |
| 2016 | 125 |
| 2017 | 69 |
| 2018 | 106 |
| 2019 | 70 |
| 2020 | 59 |
| 2021 | 75 |
| 2022 | 93 |
| 2023 | 86 |
| 2024 | 43 |