| Year | Count |
|---|---|
| 1990 | 660 |
| 1991 | 1,194 |
| 1992 | 2,576 |
| 1993 | 1,589 |
| 1994 | 1,874 |
| 1995 | 907 |
| 1996 | 632 |
| 1997 | 472 |
| 1998 | 375 |
| 1999 | 271 |
| 2000 | 182 |
| 2001 | 114 |
| 2002 | 129 |
| 2003 | 90 |
| 2004 | 58 |
| 2005 | 98 |
| 2006 | 66 |
| 2007 | 35 |
| 2008 | 82 |
| 2009 | 68 |
| 2010 | 92 |
| 2011 | 120 |
| 2012 | 102 |
| 2013 | 104 |
| 2014 | 128 |
| 2015 | 146 |
| 2016 | 104 |
| 2017 | 131 |
| 2018 | 132 |
| 2019 | 68 |
| 2020 | 56 |
| 2021 | 31 |
| 2022 | 36 |
| 2023 | 40 |