| Year | Count |
|---|---|
| 1983 | 6 |
| 1985 | 81 |
| 1986 | 31 |
| 1987 | 66 |
| 1988 | 26 |
| 1989 | 89 |
| 1990 | 120 |
| 1991 | 44 |
| 1992 | 97 |
| 1993 | 68 |
| 1994 | 62 |
| 1995 | 73 |
| 1996 | 133 |
| 1997 | 177 |
| 1998 | 203 |
| 1999 | 245 |
| 2000 | 247 |
| 2001 | 207 |
| 2002 | 195 |
| 2003 | 267 |
| 2004 | 355 |
| 2005 | 527 |
| 2006 | 523 |
| 2007 | 766 |
| 2008 | 807 |
| 2009 | 706 |
| 2010 | 760 |
| 2011 | 843 |
| 2012 | 1,018 |
| 2013 | 1,087 |
| 2014 | 1,678 |
| 2015 | 1,585 |
| 2016 | 1,388 |
| 2016 | 27 |
| 2017 | 1,345 |
| 2018 | 1,289 |
| 2019 | 1,365 |
| 2019 | 12 |
| 2020 | 1,153 |
| 2021 | 1,135 |
| 2021 | 5 |
| 2022 | 1,043 |
| 2023 | 825 |
| 2024 | 737 |