| Year | Count |
|---|---|
| 1990 | 5 |
| 1991 | 25 |
| 1992 | 16 |
| 1993 | 16 |
| 1994 | 63 |
| 1995 | 120 |
| 1996 | 154 |
| 1997 | 251 |
| 1998 | 384 |
| 1999 | 282 |
| 2000 | 263 |
| 2001 | 263 |
| 2002 | 267 |
| 2003 | 336 |
| 2004 | 417 |
| 2005 | 1,200 |
| 2006 | 2,096 |
| 2007 | 2,221 |
| 2008 | 1,922 |
| 2009 | 1,610 |
| 2010 | 1,453 |
| 2011 | 1,416 |
| 2012 | 1,358 |
| 2013 | 1,252 |
| 2014 | 1,172 |
| 2015 | 1,518 |
| 2016 | 1,665 |
| 2017 | 1,664 |
| 2018 | 1,882 |
| 2019 | 1,739 |
| 2020 | 1,784 |
| 2021 | 2,131 |
| 2022 | 2,496 |
| 2023 | 2,350 |
| 2024 | 2,452 |