| Year | Count |
|---|---|
| 1982 | 5 |
| 1986 | 6 |
| 1987 | 12 |
| 1988 | 14 |
| 1989 | 5 |
| 1990 | 32 |
| 1991 | 16 |
| 1992 | 37 |
| 1993 | 63 |
| 1994 | 23 |
| 1995 | 49 |
| 1996 | 78 |
| 1997 | 95 |
| 1998 | 92 |
| 1999 | 32 |
| 2000 | 62 |
| 2001 | 94 |
| 2002 | 56 |
| 2003 | 110 |
| 2004 | 86 |
| 2005 | 221 |
| 2006 | 171 |
| 2007 | 188 |
| 2008 | 149 |
| 2009 | 160 |
| 2010 | 131 |
| 2011 | 196 |
| 2012 | 154 |
| 2013 | 156 |
| 2014 | 186 |
| 2015 | 176 |
| 2016 | 174 |
| 2017 | 206 |
| 2018 | 127 |
| 2019 | 142 |
| 2020 | 79 |
| 2021 | 95 |
| 2022 | 102 |
| 2023 | 90 |
| 2024 | 120 |