| Year | Count |
|---|---|
| 1985 | 10 |
| 1987 | 27 |
| 1988 | 40 |
| 1989 | 112 |
| 1990 | 298 |
| 1990 | 43 |
| 1991 | 541 |
| 1991 | 30 |
| 1992 | 616 |
| 1992 | 80 |
| 1993 | 960 |
| 1993 | 94 |
| 1994 | 900 |
| 1994 | 126 |
| 1995 | 771 |
| 1995 | 119 |
| 1996 | 800 |
| 1996 | 85 |
| 1997 | 749 |
| 1997 | 88 |
| 1998 | 703 |
| 1998 | 46 |
| 1999 | 674 |
| 1999 | 62 |
| 2000 | 516 |
| 2000 | 44 |
| 2001 | 478 |
| 2001 | 5 |
| 2002 | 296 |
| 2002 | 16 |
| 2003 | 351 |
| 2003 | 24 |
| 2004 | 351 |
| 2005 | 300 |
| 2005 | 11 |
| 2006 | 288 |
| 2007 | 193 |
| 2008 | 164 |
| 2008 | 10 |
| 2009 | 218 |
| 2010 | 143 |
| 2011 | 105 |
| 2012 | 37 |
| 2013 | 62 |
| 2014 | 48 |
| 2015 | 5 |
| 2016 | 25 |
| 2017 | 15 |
| 2018 | 25 |