| Year | Count |
|---|---|
| 1985 | 10 |
| 1987 | 5 |
| 1988 | 49 |
| 1989 | 98 |
| 1990 | 86 |
| 1991 | 127 |
| 1992 | 205 |
| 1993 | 237 |
| 1994 | 384 |
| 1995 | 374 |
| 1996 | 498 |
| 1997 | 555 |
| 1998 | 686 |
| 1999 | 673 |
| 2000 | 764 |
| 2001 | 893 |
| 2002 | 835 |
| 2003 | 1,117 |
| 2004 | 1,612 |
| 2005 | 1,501 |
| 2006 | 1,460 |
| 2007 | 1,615 |
| 2008 | 1,489 |
| 2009 | 1,392 |
| 2010 | 1,498 |
| 2011 | 1,596 |
| 2012 | 1,492 |
| 2013 | 1,183 |
| 2014 | 1,158 |
| 2015 | 1,050 |
| 2016 | 870 |
| 2017 | 714 |
| 2018 | 572 |
| 2019 | 522 |
| 2020 | 463 |
| 2021 | 397 |
| 2022 | 414 |
| 2023 | 314 |
| 2024 | 237 |