| Year | Count |
|---|---|
| 1991 | 35 |
| 1992 | 60 |
| 1993 | 66 |
| 1994 | 150 |
| 1995 | 323 |
| 1996 | 229 |
| 1997 | 153 |
| 1998 | 95 |
| 1999 | 150 |
| 2000 | 10 |
| 2000 | 165 |
| 2001 | 268 |
| 2002 | 144 |
| 2003 | 176 |
| 2004 | 151 |
| 2005 | 123 |
| 2006 | 113 |
| 2007 | 84 |
| 2008 | 128 |
| 2009 | 105 |
| 2010 | 111 |
| 2011 | 138 |
| 2012 | 98 |
| 2013 | 83 |
| 2014 | 105 |
| 2015 | 130 |
| 2016 | 174 |
| 2017 | 200 |
| 2018 | 232 |
| 2019 | 398 |
| 2020 | 447 |
| 2021 | 602 |
| 2022 | 454 |
| 2023 | 478 |
| 2024 | 402 |