| Year | Count |
|---|---|
| 1964 | 5 |
| 1965 | 5 |
| 1968 | 7 |
| 1999 | 5 |
| 2000 | 14 |
| 2001 | 15 |
| 2002 | 18 |
| 2003 | 30 |
| 2004 | 42 |
| 2005 | 33 |
| 2006 | 37 |
| 2007 | 47 |
| 2008 | 66 |
| 2009 | 73 |
| 2010 | 51 |
| 2011 | 80 |
| 2012 | 98 |
| 2013 | 104 |
| 2014 | 119 |
| 2015 | 110 |
| 2016 | 345 |
| 2017 | 279 |
| 2018 | 312 |
| 2019 | 190 |
| 2020 | 174 |
| 2021 | 174 |
| 2022 | 160 |
| 2023 | 132 |
| 2024 | 100 |