| Year | Count |
|---|---|
| 1984 | 5 |
| 1985 | 10 |
| 1986 | 10 |
| 1987 | 10 |
| 1988 | 11 |
| 1992 | 27 |
| 1993 | 5 |
| 1994 | 16 |
| 1995 | 8 |
| 1996 | 54 |
| 1997 | 47 |
| 1998 | 96 |
| 1999 | 29 |
| 2000 | 67 |
| 2001 | 82 |
| 2002 | 78 |
| 2003 | 89 |
| 2004 | 227 |
| 2005 | 286 |
| 2006 | 202 |
| 2007 | 194 |
| 2008 | 226 |
| 2009 | 136 |
| 2010 | 185 |
| 2011 | 181 |
| 2012 | 173 |
| 2013 | 121 |
| 2014 | 152 |
| 2015 | 271 |
| 2016 | 195 |
| 2017 | 144 |
| 2018 | 142 |
| 2019 | 179 |
| 2020 | 150 |
| 2021 | 170 |
| 2022 | 205 |
| 2023 | 217 |
| 2024 | 239 |