| Year | Count |
|---|---|
| 1980 | 5 |
| 1984 | 5 |
| 1988 | 18 |
| 1989 | 20 |
| 1990 | 14 |
| 1991 | 5 |
| 1992 | 10 |
| 1993 | 35 |
| 1994 | 32 |
| 1995 | 31 |
| 1996 | 40 |
| 1997 | 46 |
| 1998 | 68 |
| 1999 | 38 |
| 2000 | 31 |
| 2001 | 40 |
| 2002 | 24 |
| 2003 | 16 |
| 2004 | 56 |
| 2005 | 39 |
| 2006 | 33 |
| 2007 | 18 |
| 2008 | 8 |
| 2010 | 10 |
| 2011 | 20 |
| 2012 | 18 |
| 2014 | 16 |
| 2015 | 60 |
| 2016 | 106 |
| 2017 | 133 |
| 2018 | 110 |
| 2019 | 108 |
| 2020 | 124 |
| 2021 | 207 |
| 2022 | 226 |
| 2023 | 139 |
| 2024 | 139 |