| Year | Count |
|---|---|
| 1958 | 5 |
| 1978 | 5 |
| 1987 | 12 |
| 1988 | 12 |
| 1991 | 12 |
| 1992 | 5 |
| 1993 | 21 |
| 1994 | 5 |
| 1995 | 33 |
| 1996 | 66 |
| 1997 | 44 |
| 1998 | 10 |
| 1999 | 27 |
| 2000 | 49 |
| 2001 | 51 |
| 2002 | 37 |
| 2003 | 65 |
| 2004 | 53 |
| 2005 | 67 |
| 2006 | 63 |
| 2007 | 86 |
| 2008 | 65 |
| 2009 | 51 |
| 2010 | 81 |
| 2011 | 53 |
| 2012 | 69 |
| 2013 | 56 |
| 2014 | 62 |
| 2015 | 70 |
| 2016 | 52 |
| 2017 | 60 |
| 2018 | 57 |
| 2019 | 18 |
| 2020 | 29 |
| 2021 | 41 |
| 2022 | 31 |
| 2023 | 29 |
| 2024 | 34 |