| Year | Count |
|---|---|
| 1929 | 5 |
| 1946 | 5 |
| 1952 | 5 |
| 1953 | 8 |
| 1956 | 9 |
| 1960 | 8 |
| 1961 | 6 |
| 1964 | 5 |
| 1966 | 5 |
| 1969 | 5 |
| 1970 | 5 |
| 1973 | 7 |
| 1975 | 8 |
| 1976 | 11 |
| 1987 | 6 |
| 1989 | 5 |
| 1991 | 7 |
| 1992 | 6 |
| 1993 | 6 |
| 1997 | 7 |
| 2000 | 7 |
| 2001 | 5 |
| 2003 | 5 |
| 2004 | 5 |
| 2005 | 5 |
| 2006 | 6 |
| 2011 | 7 |
| 2014 | 11 |
| 2015 | 8 |
| 2016 | 24 |
| 2017 | 20 |
| 2018 | 34 |
| 2019 | 34 |
| 2020 | 24 |
| 2021 | 26 |
| 2022 | 26 |
| 2023 | 17 |
| 2024 | 17 |