| Year | Count |
|---|---|
| 1973 | 5 |
| 1983 | 5 |
| 1984 | 7 |
| 1985 | 5 |
| 1987 | 9 |
| 1990 | 7 |
| 1991 | 7 |
| 1992 | 5 |
| 2002 | 5 |
| 2006 | 5 |
| 2007 | 7 |
| 2008 | 9 |
| 2009 | 10 |
| 2010 | 16 |
| 2011 | 9 |
| 2012 | 6 |
| 2012 | 17 |
| 2013 | 23 |
| 2014 | 9 |
| 2014 | 17 |
| 2015 | 26 |
| 2015 | 33 |
| 2016 | 54 |
| 2016 | 62 |
| 2017 | 63 |
| 2017 | 64 |
| 2018 | 30 |
| 2018 | 70 |
| 2019 | 32 |
| 2019 | 92 |
| 2020 | 56 |
| 2020 | 41 |
| 2021 | 42 |
| 2021 | 78 |
| 2022 | 34 |
| 2022 | 61 |
| 2023 | 38 |
| 2023 | 76 |
| 2024 | 40 |
| 2024 | 64 |