| Year | Count |
|---|---|
| 1984 | 5 |
| 1985 | 18 |
| 1986 | 14 |
| 1987 | 11 |
| 1988 | 10 |
| 1989 | 129 |
| 1990 | 673 |
| 1991 | 911 |
| 1992 | 956 |
| 1993 | 1,197 |
| 1994 | 1,605 |
| 1995 | 1,823 |
| 1996 | 1,811 |
| 1997 | 1,959 |
| 1998 | 2,289 |
| 1999 | 2,357 |
| 2000 | 2,709 |
| 2001 | 3,285 |
| 2002 | 3,069 |
| 2003 | 3,718 |
| 2004 | 7 |
| 2004 | 3,531 |
| 2005 | 3,411 |
| 2006 | 3,341 |
| 2007 | 3,310 |
| 2008 | 3,460 |
| 2009 | 3,565 |
| 2010 | 2,971 |
| 2011 | 3,004 |
| 2012 | 2,844 |
| 2013 | 2,736 |
| 2014 | 2,305 |
| 2015 | 2,072 |
| 2016 | 1,746 |
| 2017 | 1,388 |
| 2018 | 1,037 |
| 2019 | 919 |
| 2020 | 662 |
| 2021 | 602 |
| 2022 | 449 |
| 2023 | 312 |
| 2024 | 289 |