| Year | Count |
|---|---|
| 1916 | 5 |
| 1917 | 5 |
| 1921 | 5 |
| 1923 | 5 |
| 1956 | 5 |
| 1967 | 7 |
| 1970 | 7 |
| 1971 | 5 |
| 1972 | 5 |
| 1973 | 6 |
| 1974 | 5 |
| 1976 | 7 |
| 1977 | 6 |
| 1978 | 7 |
| 1979 | 14 |
| 1980 | 14 |
| 1981 | 7 |
| 1983 | 18 |
| 1984 | 6 |
| 1985 | 9 |
| 1989 | 8 |
| 1990 | 5 |
| 1991 | 9 |
| 2001 | 14 |
| 2003 | 20 |
| 2004 | 26 |
| 2005 | 15 |
| 2006 | 10 |
| 2007 | 33 |
| 2008 | 39 |
| 2009 | 35 |
| 2010 | 18 |
| 2011 | 36 |
| 2012 | 26 |
| 2014 | 12 |
| 2015 | 28 |
| 2016 | 24 |
| 2018 | 10 |
| 2019 | 7 |
| 2020 | 5 |
| 2021 | 11 |
| 2024 | 6 |