| Year | Count |
|---|---|
| 1916 | 6 |
| 1921 | 6 |
| 1937 | 7 |
| 1942 | 6 |
| 1943 | 6 |
| 1947 | 5 |
| 1948 | 9 |
| 1949 | 5 |
| 1950 | 10 |
| 1954 | 5 |
| 1958 | 5 |
| 1959 | 6 |
| 1962 | 8 |
| 1966 | 6 |
| 1970 | 6 |
| 1987 | 7 |
| 1989 | 5 |
| 1997 | 7 |
| 1998 | 5 |
| 2002 | 5 |
| 2006 | 6 |
| 2007 | 6 |
| 2008 | 8 |
| 2009 | 9 |
| 2010 | 8 |
| 2012 | 8 |
| 2013 | 5 |
| 2014 | 8 |
| 2015 | 11 |
| 2016 | 26 |
| 2018 | 16 |
| 2019 | 22 |
| 2020 | 7 |
| 2021 | 9 |
| 2022 | 6 |
| 2023 | 6 |
| 2024 | 12 |