| Year | Count |
|---|---|
| 1913 | 6 |
| 1914 | 23 |
| 1915 | 9 |
| 1917 | 12 |
| 1918 | 6 |
| 1919 | 15 |
| 1920 | 6 |
| 1922 | 6 |
| 1924 | 10 |
| 1925 | 5 |
| 1926 | 6 |
| 1927 | 10 |
| 1929 | 5 |
| 1933 | 6 |
| 1937 | 5 |
| 1941 | 8 |
| 1942 | 5 |
| 1947 | 6 |
| 1948 | 5 |
| 1951 | 7 |
| 1957 | 5 |
| 1960 | 7 |
| 1962 | 6 |
| 1975 | 5 |
| 1982 | 7 |
| 1984 | 7 |
| 1996 | 5 |
| 1998 | 6 |
| 1999 | 6 |
| 2000 | 6 |
| 2001 | 5 |
| 2004 | 9 |
| 2005 | 9 |
| 2006 | 5 |
| 2007 | 7 |
| 2008 | 8 |
| 2009 | 9 |
| 2010 | 6 |
| 2011 | 8 |
| 2012 | 8 |
| 2013 | 8 |
| 2014 | 12 |
| 2015 | 12 |
| 2016 | 20 |
| 2017 | 22 |
| 2018 | 10 |
| 2019 | 7 |
| 2020 | 5 |
| 2021 | 15 |
| 2022 | 6 |
| 2023 | 14 |
| 2024 | 10 |