| Year | Count |
|---|---|
| 1986 | 10 |
| 1993 | 6 |
| 1994 | 6 |
| 1995 | 9 |
| 1996 | 27 |
| 1997 | 19 |
| 1998 | 34 |
| 1999 | 26 |
| 2000 | 6 |
| 2000 | 54 |
| 2001 | 61 |
| 2002 | 50 |
| 2003 | 46 |
| 2004 | 211 |
| 2005 | 266 |
| 2006 | 311 |
| 2007 | 297 |
| 2008 | 265 |
| 2009 | 268 |
| 2010 | 248 |
| 2011 | 179 |
| 2012 | 271 |
| 2013 | 281 |
| 2014 | 239 |
| 2015 | 230 |
| 2016 | 192 |
| 2017 | 142 |
| 2018 | 154 |
| 2019 | 132 |
| 2020 | 128 |
| 2021 | 219 |
| 2022 | 167 |
| 2023 | 103 |
| 2024 | 73 |