| Year | Count |
|---|---|
| 1986 | 43 |
| 1987 | 339 |
| 1988 | 282 |
| 1989 | 187 |
| 1990 | 158 |
| 1991 | 321 |
| 1992 | 231 |
| 1993 | 211 |
| 1994 | 240 |
| 1995 | 206 |
| 1996 | 182 |
| 1997 | 144 |
| 1998 | 180 |
| 1999 | 177 |
| 2000 | 204 |
| 2001 | 261 |
| 2002 | 234 |
| 2003 | 253 |
| 2004 | 385 |
| 2005 | 443 |
| 2006 | 1,527 |
| 2007 | 1,051 |
| 2008 | 905 |
| 2009 | 871 |
| 2010 | 1,046 |
| 2011 | 1,044 |
| 2012 | 1,533 |
| 2013 | 1,181 |
| 2014 | 1,319 |
| 2015 | 1,305 |
| 2016 | 1,517 |
| 2017 | 1,601 |
| 2018 | 1,829 |
| 2019 | 1,930 |
| 2020 | 2,128 |
| 2021 | 2,913 |
| 2022 | 3,236 |
| 2023 | 2,998 |
| 2024 | 3,739 |