| Year | Count |
|---|---|
| 1982 | 6 |
| 1985 | 5 |
| 1993 | 10 |
| 1997 | 5 |
| 1998 | 5 |
| 1999 | 10 |
| 2000 | 6 |
| 2001 | 10 |
| 2002 | 15 |
| 2003 | 14 |
| 2004 | 41 |
| 2005 | 61 |
| 2006 | 75 |
| 2007 | 61 |
| 2008 | 56 |
| 2009 | 54 |
| 2010 | 56 |
| 2011 | 43 |
| 2012 | 59 |
| 2013 | 61 |
| 2014 | 93 |
| 2015 | 62 |
| 2016 | 61 |
| 2017 | 64 |
| 2018 | 44 |
| 2019 | 29 |
| 2020 | 32 |
| 2021 | 22 |
| 2022 | 30 |
| 2023 | 51 |
| 2024 | 35 |