| Year | Count |
|---|---|
| 1986 | 10 |
| 1987 | 14 |
| 1989 | 10 |
| 1991 | 5 |
| 1992 | 18 |
| 1993 | 46 |
| 1994 | 31 |
| 1995 | 44 |
| 1996 | 7 |
| 1997 | 6 |
| 1998 | 31 |
| 1999 | 48 |
| 2000 | 127 |
| 2001 | 168 |
| 2002 | 137 |
| 2003 | 235 |
| 2004 | 380 |
| 2005 | 562 |
| 2006 | 467 |
| 2007 | 559 |
| 2008 | 512 |
| 2009 | 447 |
| 2010 | 549 |
| 2011 | 694 |
| 2012 | 677 |
| 2013 | 546 |
| 2014 | 550 |
| 2015 | 658 |
| 2016 | 656 |
| 2017 | 780 |
| 2018 | 778 |
| 2019 | 974 |
| 2020 | 1,013 |
| 2021 | 1,527 |
| 2022 | 2,212 |
| 2023 | 5,024 |
| 2024 | 6,368 |