| Year | Count |
|---|---|
| 1991 | 83 |
| 1992 | 1,981 |
| 1993 | 1,200 |
| 1994 | 1,105 |
| 1995 | 843 |
| 1996 | 772 |
| 1997 | 515 |
| 1998 | 378 |
| 1999 | 243 |
| 2000 | 222 |
| 2001 | 208 |
| 2002 | 101 |
| 2003 | 93 |
| 2004 | 101 |
| 2005 | 46 |
| 2006 | 43 |
| 2007 | 6 |
| 2008 | 7 |
| 2009 | 11 |
| 2010 | 22 |
| 2011 | 6 |
| 2012 | 61 |
| 2013 | 31 |
| 2014 | 39 |
| 2015 | 30 |
| 2016 | 42 |
| 2017 | 70 |
| 2018 | 67 |
| 2019 | 36 |
| 2020 | 23 |
| 2021 | 16 |
| 2022 | 26 |
| 2023 | 14 |
| 2024 | 18 |