| Year | Count |
|---|---|
| 1974 | 5 |
| 1985 | 6 |
| 1991 | 5 |
| 1993 | 21 |
| 1994 | 10 |
| 1996 | 18 |
| 1997 | 20 |
| 1999 | 18 |
| 2000 | 27 |
| 2001 | 16 |
| 2002 | 14 |
| 2003 | 25 |
| 2004 | 61 |
| 2005 | 37 |
| 2006 | 29 |
| 2007 | 23 |
| 2008 | 12 |
| 2009 | 12 |
| 2010 | 33 |
| 2011 | 47 |
| 2012 | 33 |
| 2013 | 16 |
| 2014 | 32 |
| 2015 | 47 |
| 2016 | 46 |
| 2017 | 23 |
| 2018 | 55 |
| 2019 | 70 |
| 2020 | 54 |
| 2021 | 99 |
| 2022 | 81 |
| 2023 | 107 |
| 2024 | 86 |