| Year | Count |
|---|---|
| 1913 | 7 |
| 1915 | 39 |
| 1916 | 25 |
| 1918 | 29 |
| 1919 | 33 |
| 1920 | 31 |
| 1921 | 32 |
| 1922 | 30 |
| 1923 | 24 |
| 1924 | 21 |
| 1925 | 38 |
| 1926 | 34 |
| 1927 | 39 |
| 1928 | 5 |
| 1929 | 40 |
| 1930 | 9 |
| 1931 | 37 |
| 1932 | 6 |
| 1933 | 45 |
| 1934 | 33 |
| 1938 | 10 |
| 1939 | 15 |
| 1940 | 10 |
| 1949 | 18 |
| 1996 | 6 |
| 1998 | 5 |
| 1999 | 5 |
| 2000 | 10 |
| 2001 | 12 |
| 2002 | 9 |
| 2003 | 11 |
| 2004 | 8 |
| 2005 | 22 |
| 2006 | 12 |
| 2007 | 12 |
| 2008 | 12 |
| 2009 | 13 |
| 2010 | 16 |
| 2011 | 15 |
| 2012 | 13 |
| 2013 | 10 |
| 2014 | 9 |
| 2015 | 10 |
| 2016 | 14 |
| 2017 | 10 |
| 2018 | 9 |
| 2021 | 8 |
| 2022 | 5 |
| 2024 | 8 |