| Year | Count |
|---|---|
| 1983 | 7 |
| 1986 | 18 |
| 1987 | 18 |
| 1988 | 12 |
| 1990 | 6 |
| 1991 | 10 |
| 1993 | 37 |
| 1994 | 191 |
| 1995 | 96 |
| 1996 | 169 |
| 1997 | 161 |
| 1998 | 156 |
| 1999 | 140 |
| 2000 | 157 |
| 2001 | 275 |
| 2002 | 333 |
| 2003 | 331 |
| 2004 | 920 |
| 2005 | 1,018 |
| 2006 | 744 |
| 2007 | 719 |
| 2008 | 680 |
| 2009 | 463 |
| 2010 | 486 |
| 2011 | 638 |
| 2012 | 639 |
| 2013 | 495 |
| 2014 | 435 |
| 2015 | 568 |
| 2016 | 542 |
| 2017 | 581 |
| 2018 | 400 |
| 2019 | 447 |
| 2020 | 398 |
| 2021 | 448 |
| 2022 | 567 |
| 2023 | 749 |
| 2024 | 700 |