| Year | Count |
|---|---|
| 1984 | 10 |
| 1985 | 12 |
| 1986 | 22 |
| 1987 | 20 |
| 1988 | 10 |
| 1989 | 12 |
| 1990 | 40 |
| 1991 | 47 |
| 1992 | 54 |
| 1993 | 93 |
| 1994 | 143 |
| 1995 | 300 |
| 1996 | 485 |
| 1997 | 661 |
| 1998 | 1,017 |
| 1999 | 1,126 |
| 2000 | 1,454 |
| 2001 | 1,688 |
| 2002 | 1,797 |
| 2003 | 1,909 |
| 2004 | 2,255 |
| 2004 | 14 |
| 2005 | 2,515 |
| 2006 | 4,689 |
| 2007 | 3,564 |
| 2008 | 3,756 |
| 2009 | 3,007 |
| 2010 | 2,752 |
| 2011 | 2,650 |
| 2012 | 2,240 |
| 2013 | 1,875 |
| 2014 | 1,690 |
| 2015 | 1,616 |
| 2016 | 1,727 |
| 2017 | 1,687 |
| 2018 | 1,574 |
| 2019 | 1,359 |
| 2020 | 1,091 |
| 2021 | 1,169 |
| 2022 | 1,144 |
| 2023 | 1,007 |
| 2024 | 881 |