| Year | Count |
|---|---|
| 1969 | 5 |
| 1986 | 5 |
| 1987 | 5 |
| 1994 | 8 |
| 1996 | 9 |
| 1998 | 10 |
| 1999 | 7 |
| 2000 | 5 |
| 2001 | 9 |
| 2002 | 15 |
| 2003 | 22 |
| 2004 | 35 |
| 2005 | 47 |
| 2006 | 54 |
| 2007 | 28 |
| 2008 | 37 |
| 2009 | 31 |
| 2010 | 43 |
| 2011 | 72 |
| 2012 | 31 |
| 2013 | 67 |
| 2014 | 55 |
| 2015 | 32 |
| 2016 | 27 |
| 2017 | 69 |
| 2018 | 27 |
| 2019 | 69 |
| 2020 | 58 |
| 2021 | 29 |
| 2022 | 37 |
| 2023 | 38 |
| 2024 | 10 |