| Year | Count |
|---|---|
| 1984 | 5 |
| 1986 | 5 |
| 1988 | 10 |
| 1995 | 8 |
| 1998 | 5 |
| 2000 | 5 |
| 2001 | 6 |
| 2002 | 13 |
| 2003 | 10 |
| 2004 | 10 |
| 2005 | 40 |
| 2006 | 36 |
| 2007 | 99 |
| 2008 | 197 |
| 2009 | 165 |
| 2010 | 177 |
| 2011 | 328 |
| 2012 | 443 |
| 2013 | 309 |
| 2014 | 345 |
| 2015 | 292 |
| 2016 | 275 |
| 2017 | 305 |
| 2018 | 233 |
| 2019 | 127 |
| 2020 | 123 |
| 2021 | 155 |
| 2022 | 121 |
| 2023 | 107 |
| 2024 | 72 |