| Year | Count |
|---|---|
| 1986 | 5 |
| 1994 | 6 |
| 1995 | 5 |
| 1997 | 7 |
| 1998 | 5 |
| 1999 | 8 |
| 2000 | 8 |
| 2001 | 9 |
| 2002 | 16 |
| 2003 | 9 |
| 2004 | 10 |
| 2005 | 18 |
| 2006 | 15 |
| 2007 | 17 |
| 2008 | 22 |
| 2009 | 31 |
| 2010 | 31 |
| 2011 | 37 |
| 2012 | 35 |
| 2013 | 36 |
| 2014 | 46 |
| 2015 | 45 |
| 2016 | 122 |
| 2017 | 194 |
| 2018 | 260 |
| 2019 | 204 |
| 2020 | 93 |
| 2021 | 90 |
| 2022 | 106 |
| 2023 | 92 |
| 2024 | 92 |