| Year | Count |
|---|---|
| 1983 | 5 |
| 1987 | 5 |
| 1988 | 5 |
| 1989 | 5 |
| 1990 | 6 |
| 1991 | 15 |
| 1992 | 6 |
| 1994 | 32 |
| 1995 | 12 |
| 1996 | 16 |
| 1997 | 28 |
| 1998 | 34 |
| 1999 | 21 |
| 2000 | 50 |
| 2001 | 14 |
| 2002 | 20 |
| 2003 | 5 |
| 2004 | 47 |
| 2005 | 49 |
| 2006 | 16 |
| 2007 | 49 |
| 2008 | 31 |
| 2009 | 23 |
| 2010 | 25 |
| 2011 | 52 |
| 2012 | 52 |
| 2013 | 65 |
| 2014 | 28 |
| 2015 | 53 |
| 2016 | 58 |
| 2017 | 100 |
| 2018 | 93 |
| 2019 | 68 |
| 2020 | 11 |
| 2021 | 34 |
| 2022 | 51 |
| 2023 | 36 |
| 2024 | 34 |