| Year | Count |
|---|---|
| 1987 | 50 |
| 1988 | 65 |
| 1989 | 52 |
| 1990 | 119 |
| 1991 | 92 |
| 1992 | 194 |
| 1993 | 294 |
| 1994 | 156 |
| 1995 | 130 |
| 1996 | 176 |
| 1997 | 111 |
| 1998 | 214 |
| 1999 | 195 |
| 2000 | 154 |
| 2001 | 222 |
| 2002 | 190 |
| 2003 | 277 |
| 2004 | 351 |
| 2005 | 433 |
| 2006 | 407 |
| 2007 | 452 |
| 2008 | 1,104 |
| 2009 | 869 |
| 2010 | 639 |
| 2011 | 663 |
| 2012 | 741 |
| 2013 | 749 |
| 2014 | 778 |
| 2015 | 829 |
| 2016 | 837 |
| 2017 | 759 |
| 2018 | 714 |
| 2018 | 10 |
| 2019 | 802 |
| 2020 | 775 |
| 2021 | 790 |
| 2022 | 870 |
| 2023 | 763 |
| 2024 | 695 |