| Year | Count |
|---|---|
| 1910 | 5 |
| 1912 | 8 |
| 1915 | 9 |
| 1916 | 7 |
| 1917 | 10 |
| 1918 | 6 |
| 1920 | 10 |
| 1922 | 14 |
| 1923 | 12 |
| 1924 | 10 |
| 1926 | 10 |
| 1929 | 10 |
| 1932 | 5 |
| 1934 | 7 |
| 1948 | 5 |
| 1949 | 6 |
| 1954 | 7 |
| 1955 | 6 |
| 1957 | 10 |
| 1958 | 12 |
| 1961 | 5 |
| 1969 | 5 |
| 1988 | 5 |
| 1990 | 7 |
| 1993 | 5 |
| 1996 | 9 |
| 1997 | 5 |
| 1999 | 6 |
| 2000 | 7 |
| 2002 | 5 |
| 2003 | 9 |
| 2004 | 6 |
| 2005 | 10 |
| 2006 | 10 |
| 2007 | 17 |
| 2008 | 13 |
| 2009 | 9 |
| 2010 | 14 |
| 2011 | 10 |
| 2012 | 10 |
| 2013 | 10 |
| 2014 | 8 |
| 2015 | 45 |
| 2016 | 24 |
| 2017 | 48 |
| 2018 | 13 |
| 2019 | 24 |
| 2020 | 26 |
| 2021 | 20 |
| 2022 | 26 |
| 2023 | 22 |
| 2024 | 34 |