| Year | Count |
|---|---|
| 1914 | 6 |
| 1915 | 7 |
| 1917 | 5 |
| 1918 | 10 |
| 1919 | 5 |
| 1920 | 8 |
| 1921 | 6 |
| 1922 | 10 |
| 1925 | 10 |
| 1926 | 16 |
| 1927 | 10 |
| 1928 | 16 |
| 1929 | 10 |
| 1934 | 6 |
| 1936 | 6 |
| 1942 | 5 |
| 1946 | 10 |
| 1950 | 9 |
| 1955 | 5 |
| 1956 | 7 |
| 1957 | 14 |
| 1959 | 16 |
| 1962 | 6 |
| 1963 | 6 |
| 1966 | 5 |
| 1971 | 5 |
| 1972 | 5 |
| 2004 | 5 |
| 2005 | 7 |
| 2006 | 9 |
| 2007 | 6 |
| 2008 | 5 |
| 2009 | 5 |
| 2010 | 9 |
| 2011 | 7 |
| 2012 | 12 |
| 2013 | 10 |
| 2014 | 14 |
| 2015 | 27 |
| 2016 | 21 |
| 2017 | 27 |
| 2018 | 20 |
| 2019 | 16 |
| 2020 | 10 |
| 2021 | 24 |
| 2022 | 46 |
| 2023 | 30 |
| 2024 | 50 |