| Year | Count |
|---|---|
| 1977 | 5 |
| 1979 | 5 |
| 1981 | 10 |
| 1983 | 5 |
| 1995 | 6 |
| 1998 | 7 |
| 1999 | 12 |
| 2000 | 10 |
| 2002 | 6 |
| 2003 | 26 |
| 2004 | 28 |
| 2005 | 39 |
| 2006 | 42 |
| 2007 | 20 |
| 2008 | 52 |
| 2009 | 52 |
| 2010 | 43 |
| 2011 | 88 |
| 2012 | 57 |
| 2013 | 57 |
| 2014 | 58 |
| 2015 | 58 |
| 2016 | 72 |
| 2017 | 30 |
| 2018 | 57 |
| 2019 | 41 |
| 2020 | 34 |
| 2021 | 88 |
| 2022 | 33 |
| 2023 | 37 |
| 2024 | 43 |