| Year | Count |
|---|---|
| 1950 | 14 |
| 1951 | 13 |
| 1952 | 7 |
| 1953 | 8 |
| 1956 | 11 |
| 1972 | 6 |
| 1973 | 6 |
| 1975 | 7 |
| 1980 | 8 |
| 1981 | 5 |
| 1983 | 7 |
| 1984 | 8 |
| 1986 | 12 |
| 1987 | 12 |
| 1996 | 8 |
| 1997 | 12 |
| 2004 | 18 |
| 2005 | 28 |
| 2006 | 17 |
| 2007 | 19 |
| 2008 | 11 |
| 2010 | 37 |
| 2011 | 15 |
| 2013 | 36 |
| 2014 | 24 |
| 2015 | 31 |
| 2016 | 8 |
| 2017 | 18 |
| 2018 | 11 |
| 2019 | 16 |
| 2020 | 24 |
| 2021 | 35 |
| 2022 | 30 |
| 2023 | 32 |
| 2024 | 67 |