| Year | Count |
|---|---|
| 1963 | 5 |
| 1964 | 5 |
| 1974 | 11 |
| 1975 | 28 |
| 1976 | 41 |
| 1977 | 26 |
| 1978 | 18 |
| 1979 | 16 |
| 1981 | 9 |
| 1982 | 5 |
| 1988 | 6 |
| 1998 | 6 |
| 2000 | 7 |
| 2002 | 8 |
| 2003 | 5 |
| 2004 | 22 |
| 2005 | 11 |
| 2006 | 29 |
| 2007 | 27 |
| 2008 | 28 |
| 2009 | 30 |
| 2010 | 41 |
| 2011 | 41 |
| 2012 | 45 |
| 2013 | 39 |
| 2014 | 64 |
| 2015 | 68 |
| 2016 | 174 |
| 2017 | 189 |
| 2018 | 55 |
| 2019 | 132 |
| 2020 | 104 |
| 2021 | 92 |
| 2022 | 130 |
| 2023 | 146 |
| 2024 | 134 |