| Year | Count |
|---|---|
| 1990 | 5 |
| 1991 | 5 |
| 1993 | 6 |
| 1994 | 5 |
| 1995 | 11 |
| 1996 | 21 |
| 1997 | 53 |
| 1998 | 23 |
| 1999 | 44 |
| 2000 | 89 |
| 2001 | 82 |
| 2002 | 124 |
| 2003 | 149 |
| 2004 | 181 |
| 2005 | 212 |
| 2006 | 262 |
| 2007 | 307 |
| 2008 | 422 |
| 2009 | 338 |
| 2010 | 397 |
| 2011 | 310 |
| 2012 | 407 |
| 2013 | 438 |
| 2014 | 560 |
| 2015 | 618 |
| 2016 | 703 |
| 2017 | 759 |
| 2018 | 709 |
| 2019 | 602 |
| 2020 | 581 |
| 2021 | 673 |
| 2022 | 621 |
| 2023 | 650 |
| 2024 | 712 |