| Year | Count |
|---|---|
| 1983 | 5 |
| 1984 | 15 |
| 1985 | 52 |
| 1986 | 159 |
| 1987 | 202 |
| 1988 | 416 |
| 1989 | 574 |
| 1990 | 756 |
| 1991 | 978 |
| 1992 | 1,008 |
| 1993 | 1,397 |
| 1994 | 1,262 |
| 1995 | 1,470 |
| 1996 | 1,533 |
| 1997 | 1,515 |
| 1998 | 1,891 |
| 1999 | 1,485 |
| 2000 | 1,474 |
| 2001 | 1,365 |
| 2002 | 1,260 |
| 2003 | 1,376 |
| 2004 | 1,669 |
| 2005 | 1,454 |
| 2006 | 1,517 |
| 2007 | 1,464 |
| 2008 | 1,284 |
| 2009 | 1,024 |
| 2010 | 1,005 |
| 2011 | 921 |
| 2012 | 840 |
| 2013 | 649 |
| 2014 | 559 |
| 2015 | 503 |
| 2016 | 230 |
| 2017 | 154 |
| 2018 | 106 |
| 2019 | 152 |
| 2020 | 126 |
| 2021 | 31 |
| 2022 | 37 |
| 2023 | 12 |
| 2024 | 51 |