| Year | Count |
|---|---|
| 1987 | 5 |
| 1993 | 6 |
| 1994 | 18 |
| 1995 | 22 |
| 1996 | 23 |
| 1997 | 30 |
| 1998 | 10 |
| 1999 | 18 |
| 2000 | 20 |
| 2001 | 6 |
| 2002 | 23 |
| 2003 | 21 |
| 2004 | 14 |
| 2005 | 36 |
| 2006 | 18 |
| 2007 | 39 |
| 2008 | 61 |
| 2009 | 30 |
| 2010 | 41 |
| 2011 | 20 |
| 2012 | 61 |
| 2013 | 48 |
| 2014 | 73 |
| 2015 | 79 |
| 2016 | 63 |
| 2017 | 65 |
| 2018 | 103 |
| 2019 | 79 |
| 2020 | 37 |
| 2021 | 62 |
| 2022 | 63 |
| 2023 | 77 |
| 2024 | 110 |