| Year | Count |
|---|---|
| 1991 | 89 |
| 1992 | 681 |
| 1993 | 714 |
| 1994 | 513 |
| 1995 | 379 |
| 1996 | 269 |
| 1997 | 230 |
| 1998 | 253 |
| 1999 | 267 |
| 2000 | 299 |
| 2001 | 249 |
| 2002 | 177 |
| 2003 | 150 |
| 2004 | 110 |
| 2005 | 103 |
| 2006 | 72 |
| 2007 | 59 |
| 2008 | 46 |
| 2009 | 38 |
| 2010 | 58 |
| 2011 | 17 |
| 2012 | 40 |
| 2013 | 6 |
| 2014 | 15 |
| 2015 | 32 |
| 2016 | 23 |
| 2017 | 23 |
| 2018 | 20 |
| 2019 | 16 |
| 2020 | 11 |
| 2021 | 5 |
| 2022 | 47 |
| 2023 | 5 |
| 2024 | 20 |