| Year | Count |
|---|---|
| 1913 | 5 |
| 1914 | 7 |
| 1915 | 5 |
| 1916 | 5 |
| 1917 | 5 |
| 1918 | 12 |
| 1920 | 6 |
| 1921 | 6 |
| 1926 | 5 |
| 1943 | 5 |
| 1947 | 6 |
| 1948 | 5 |
| 1949 | 5 |
| 1951 | 7 |
| 1968 | 5 |
| 1970 | 5 |
| 1971 | 8 |
| 1974 | 5 |
| 1975 | 5 |
| 1979 | 6 |
| 1980 | 5 |
| 1981 | 5 |
| 1982 | 6 |
| 1983 | 7 |
| 1984 | 7 |
| 1988 | 5 |
| 1991 | 7 |
| 1992 | 7 |
| 1997 | 11 |
| 1999 | 10 |
| 2000 | 10 |
| 2001 | 8 |
| 2002 | 8 |
| 2003 | 12 |
| 2004 | 7 |
| 2005 | 10 |
| 2006 | 8 |
| 2007 | 9 |
| 2008 | 13 |
| 2009 | 6 |
| 2010 | 9 |
| 2011 | 15 |
| 2012 | 15 |
| 2013 | 7 |
| 2014 | 7 |
| 2015 | 12 |
| 2016 | 14 |
| 2017 | 20 |
| 2018 | 10 |
| 2019 | 20 |
| 2020 | 5 |
| 2021 | 5 |
| 2022 | 8 |
| 2023 | 5 |
| 2024 | 5 |