| Year | Count |
|---|---|
| 1985 | 64 |
| 1986 | 323 |
| 1987 | 345 |
| 1988 | 420 |
| 1989 | 378 |
| 1990 | 458 |
| 1991 | 584 |
| 1992 | 647 |
| 1993 | 545 |
| 1994 | 635 |
| 1995 | 562 |
| 1996 | 592 |
| 1997 | 686 |
| 1998 | 867 |
| 1999 | 690 |
| 2000 | 719 |
| 2001 | 787 |
| 2002 | 712 |
| 2003 | 783 |
| 2004 | 862 |
| 2005 | 890 |
| 2006 | 819 |
| 2007 | 743 |
| 2008 | 645 |
| 2009 | 542 |
| 2010 | 539 |
| 2011 | 491 |
| 2012 | 422 |
| 2013 | 328 |
| 2014 | 288 |
| 2015 | 281 |
| 2016 | 160 |
| 2017 | 184 |
| 2018 | 153 |
| 2019 | 136 |
| 2020 | 113 |
| 2021 | 84 |
| 2022 | 50 |
| 2023 | 51 |
| 2024 | 11 |