| Year | Count |
|---|---|
| 1915 | 5 |
| 1919 | 5 |
| 1930 | 5 |
| 1933 | 5 |
| 1935 | 6 |
| 1949 | 6 |
| 1961 | 5 |
| 1968 | 5 |
| 1970 | 5 |
| 1974 | 5 |
| 1978 | 5 |
| 1981 | 6 |
| 1983 | 6 |
| 1987 | 6 |
| 1990 | 9 |
| 1996 | 5 |
| 1997 | 7 |
| 2004 | 11 |
| 2005 | 6 |
| 2006 | 12 |
| 2007 | 10 |
| 2008 | 12 |
| 2009 | 9 |
| 2009 | 5 |
| 2010 | 15 |
| 2011 | 16 |
| 2012 | 17 |
| 2013 | 22 |
| 2014 | 32 |
| 2015 | 25 |
| 2016 | 54 |
| 2017 | 60 |
| 2018 | 17 |
| 2019 | 56 |
| 2019 | 5 |
| 2020 | 54 |
| 2021 | 36 |
| 2022 | 40 |
| 2023 | 26 |
| 2024 | 22 |