| Year | Count |
|---|---|
| 1989 | 5 |
| 1990 | 6 |
| 1992 | 5 |
| 1994 | 33 |
| 1995 | 48 |
| 1996 | 101 |
| 1997 | 259 |
| 1998 | 345 |
| 1999 | 405 |
| 2000 | 664 |
| 2001 | 766 |
| 2002 | 733 |
| 2003 | 983 |
| 2004 | 1,320 |
| 2005 | 1,393 |
| 2006 | 1,471 |
| 2007 | 1,810 |
| 2008 | 1,689 |
| 2009 | 1,604 |
| 2010 | 1,534 |
| 2011 | 1,294 |
| 2012 | 1,118 |
| 2013 | 925 |
| 2014 | 770 |
| 2015 | 801 |
| 2016 | 623 |
| 2017 | 618 |
| 2018 | 554 |
| 2019 | 548 |
| 2020 | 504 |
| 2021 | 459 |
| 2022 | 383 |
| 2023 | 232 |
| 2024 | 217 |