| Year | Count |
|---|---|
| 1983 | 37 |
| 1984 | 131 |
| 1985 | 325 |
| 1986 | 440 |
| 1987 | 479 |
| 1988 | 344 |
| 1989 | 296 |
| 1990 | 343 |
| 1991 | 441 |
| 1992 | 561 |
| 1993 | 875 |
| 1994 | 1,141 |
| 1995 | 1,148 |
| 1996 | 1,270 |
| 1997 | 1,381 |
| 1998 | 1,658 |
| 1999 | 1,493 |
| 2000 | 1,540 |
| 2001 | 1,430 |
| 2002 | 1,419 |
| 2003 | 1,511 |
| 2004 | 1,558 |
| 2004 | 16 |
| 2005 | 1,639 |
| 2006 | 1,812 |
| 2007 | 1,806 |
| 2008 | 1,293 |
| 2009 | 1,063 |
| 2010 | 854 |
| 2011 | 1,033 |
| 2012 | 833 |
| 2013 | 706 |
| 2014 | 713 |
| 2015 | 729 |
| 2016 | 646 |
| 2017 | 649 |
| 2018 | 482 |
| 2019 | 494 |
| 2020 | 460 |
| 2021 | 549 |
| 2022 | 418 |
| 2023 | 383 |
| 2024 | 259 |