| Year | Count |
|---|---|
| 1986 | 10 |
| 1988 | 18 |
| 1989 | 18 |
| 1991 | 14 |
| 1992 | 11 |
| 1993 | 5 |
| 1994 | 7 |
| 1995 | 10 |
| 1996 | 22 |
| 1996 | 6 |
| 1997 | 7 |
| 1998 | 12 |
| 1999 | 13 |
| 1999 | 5 |
| 2001 | 6 |
| 2002 | 30 |
| 2002 | 10 |
| 2003 | 60 |
| 2004 | 29 |
| 2005 | 44 |
| 2006 | 133 |
| 2007 | 204 |
| 2008 | 264 |
| 2009 | 189 |
| 2010 | 224 |
| 2011 | 296 |
| 2012 | 493 |
| 2013 | 634 |
| 2014 | 689 |
| 2015 | 840 |
| 2016 | 1,177 |
| 2017 | 1,076 |
| 2018 | 1,417 |
| 2019 | 1,369 |
| 2019 | 5 |
| 2020 | 1,377 |
| 2021 | 1,830 |
| 2022 | 2,021 |
| 2023 | 2,004 |
| 2024 | 1,465 |