| Year | Count |
|---|---|
| 1986 | 5 |
| 1988 | 14 |
| 1989 | 49 |
| 1990 | 46 |
| 1991 | 78 |
| 1992 | 89 |
| 1993 | 143 |
| 1994 | 158 |
| 1995 | 289 |
| 1996 | 353 |
| 1997 | 275 |
| 1998 | 257 |
| 1999 | 339 |
| 2000 | 359 |
| 2001 | 343 |
| 2002 | 362 |
| 2003 | 378 |
| 2004 | 351 |
| 2005 | 371 |
| 2006 | 433 |
| 2007 | 489 |
| 2008 | 691 |
| 2009 | 693 |
| 2010 | 810 |
| 2011 | 776 |
| 2012 | 1,024 |
| 2013 | 942 |
| 2014 | 934 |
| 2015 | 1,057 |
| 2016 | 904 |
| 2017 | 927 |
| 2018 | 982 |
| 2019 | 934 |
| 2020 | 803 |
| 2021 | 787 |
| 2022 | 707 |
| 2023 | 635 |
| 2024 | 620 |