| Year | Count |
|---|---|
| 1988 | 48 |
| 1989 | 246 |
| 1990 | 186 |
| 1991 | 177 |
| 1992 | 284 |
| 1993 | 143 |
| 1994 | 107 |
| 1995 | 116 |
| 1996 | 92 |
| 1997 | 94 |
| 1998 | 103 |
| 1999 | 139 |
| 2000 | 141 |
| 2001 | 121 |
| 2002 | 198 |
| 2003 | 197 |
| 2004 | 199 |
| 2005 | 226 |
| 2006 | 5 |
| 2006 | 304 |
| 2007 | 280 |
| 2008 | 313 |
| 2009 | 376 |
| 2010 | 5 |
| 2010 | 345 |
| 2011 | 5 |
| 2011 | 466 |
| 2012 | 451 |
| 2013 | 7 |
| 2013 | 513 |
| 2014 | 8 |
| 2014 | 586 |
| 2015 | 638 |
| 2016 | 21 |
| 2016 | 665 |
| 2017 | 21 |
| 2017 | 800 |
| 2018 | 897 |
| 2019 | 969 |
| 2020 | 12 |
| 2020 | 954 |
| 2021 | 12 |
| 2021 | 1,316 |
| 2022 | 1,420 |
| 2023 | 1,421 |
| 2024 | 1,698 |