| Year | Count |
|---|---|
| 1914 | 10 |
| 1915 | 23 |
| 1916 | 10 |
| 1917 | 30 |
| 1918 | 40 |
| 1919 | 27 |
| 1920 | 26 |
| 1921 | 23 |
| 1922 | 48 |
| 1923 | 37 |
| 1924 | 21 |
| 1925 | 28 |
| 1927 | 28 |
| 1928 | 5 |
| 1929 | 6 |
| 1930 | 21 |
| 1932 | 22 |
| 1934 | 15 |
| 1936 | 10 |
| 1937 | 13 |
| 1943 | 5 |
| 1948 | 5 |
| 1964 | 15 |
| 1972 | 6 |
| 1975 | 5 |
| 1981 | 5 |
| 1984 | 7 |
| 1986 | 7 |
| 1989 | 5 |
| 1992 | 9 |
| 1994 | 5 |
| 1996 | 5 |
| 1999 | 5 |
| 2000 | 6 |
| 2002 | 6 |
| 2003 | 10 |
| 2004 | 5 |
| 2006 | 29 |
| 2007 | 11 |
| 2008 | 6 |
| 2010 | 13 |
| 2011 | 12 |
| 2012 | 17 |
| 2013 | 22 |
| 2014 | 38 |
| 2016 | 18 |
| 2017 | 12 |
| 2018 | 12 |
| 2019 | 20 |
| 2020 | 24 |
| 2021 | 13 |
| 2022 | 17 |
| 2023 | 8 |
| 2024 | 14 |