| Year | Count |
|---|---|
| 1974 | 5 |
| 1975 | 9 |
| 1976 | 5 |
| 1977 | 11 |
| 1978 | 8 |
| 1980 | 5 |
| 1983 | 5 |
| 1986 | 12 |
| 1987 | 18 |
| 1989 | 5 |
| 2002 | 6 |
| 2004 | 19 |
| 2005 | 22 |
| 2006 | 20 |
| 2007 | 30 |
| 2008 | 23 |
| 2009 | 17 |
| 2010 | 38 |
| 2011 | 15 |
| 2012 | 66 |
| 2013 | 18 |
| 2014 | 18 |
| 2015 | 33 |
| 2016 | 34 |
| 2017 | 69 |
| 2018 | 34 |
| 2019 | 26 |
| 2020 | 62 |
| 2021 | 58 |
| 2022 | 43 |
| 2023 | 15 |
| 2024 | 43 |