| Year | Count |
|---|---|
| 1983 | 14 |
| 1984 | 26 |
| 1985 | 32 |
| 1986 | 75 |
| 1987 | 123 |
| 1988 | 176 |
| 1989 | 228 |
| 1990 | 275 |
| 1991 | 359 |
| 1992 | 341 |
| 1993 | 484 |
| 1994 | 487 |
| 1995 | 545 |
| 1995 | 5 |
| 1996 | 521 |
| 1997 | 716 |
| 1998 | 703 |
| 1999 | 605 |
| 2000 | 670 |
| 2001 | 688 |
| 2002 | 564 |
| 2003 | 733 |
| 2004 | 877 |
| 2005 | 952 |
| 2006 | 974 |
| 2007 | 1,054 |
| 2008 | 1,012 |
| 2009 | 880 |
| 2010 | 869 |
| 2011 | 915 |
| 2011 | 5 |
| 2012 | 747 |
| 2013 | 728 |
| 2014 | 561 |
| 2015 | 509 |
| 2016 | 353 |
| 2017 | 366 |
| 2018 | 254 |
| 2019 | 227 |
| 2020 | 166 |
| 2021 | 198 |
| 2022 | 185 |
| 2023 | 103 |
| 2024 | 105 |