| Year | Count |
|---|---|
| 1985 | 6 |
| 1986 | 5 |
| 1989 | 10 |
| 1990 | 23 |
| 1991 | 33 |
| 1992 | 35 |
| 1993 | 42 |
| 1994 | 29 |
| 1995 | 60 |
| 1996 | 39 |
| 1997 | 35 |
| 1998 | 59 |
| 1999 | 93 |
| 2000 | 137 |
| 2001 | 224 |
| 2002 | 178 |
| 2003 | 275 |
| 2004 | 228 |
| 2005 | 163 |
| 2006 | 236 |
| 2007 | 237 |
| 2008 | 281 |
| 2009 | 255 |
| 2010 | 252 |
| 2011 | 236 |
| 2012 | 352 |
| 2013 | 387 |
| 2014 | 323 |
| 2015 | 439 |
| 2016 | 290 |
| 2017 | 327 |
| 2018 | 253 |
| 2019 | 209 |
| 2020 | 255 |
| 2021 | 5 |
| 2021 | 434 |
| 2022 | 354 |
| 2023 | 322 |
| 2024 | 10 |
| 2024 | 323 |