| Year | Count |
|---|---|
| 1992 | 10 |
| 1994 | 6 |
| 1995 | 28 |
| 1996 | 18 |
| 1997 | 44 |
| 1998 | 22 |
| 1999 | 56 |
| 2000 | 38 |
| 2001 | 60 |
| 2002 | 66 |
| 2003 | 112 |
| 2004 | 139 |
| 2005 | 216 |
| 2006 | 222 |
| 2007 | 249 |
| 2008 | 253 |
| 2009 | 298 |
| 2010 | 423 |
| 2011 | 589 |
| 2012 | 852 |
| 2013 | 841 |
| 2014 | 919 |
| 2015 | 1,195 |
| 2016 | 1,269 |
| 2017 | 1,247 |
| 2018 | 1,136 |
| 2019 | 1,062 |
| 2020 | 953 |
| 2021 | 1,016 |
| 2022 | 1,023 |
| 2023 | 1,010 |
| 2024 | 909 |