| Year | Count |
|---|---|
| 1917 | 14 |
| 1918 | 7 |
| 1919 | 5 |
| 1920 | 12 |
| 1921 | 34 |
| 1922 | 13 |
| 1923 | 11 |
| 1924 | 7 |
| 1925 | 20 |
| 1926 | 5 |
| 1927 | 7 |
| 1929 | 6 |
| 1930 | 7 |
| 1936 | 5 |
| 1940 | 5 |
| 1941 | 13 |
| 1943 | 7 |
| 1949 | 5 |
| 1952 | 7 |
| 1953 | 10 |
| 1992 | 26 |
| 1993 | 7 |
| 1995 | 18 |
| 1996 | 17 |
| 1997 | 5 |
| 1998 | 34 |
| 1999 | 10 |
| 2000 | 30 |
| 2001 | 19 |
| 2002 | 10 |
| 2003 | 10 |
| 2004 | 35 |
| 2005 | 42 |
| 2006 | 50 |
| 2007 | 102 |
| 2008 | 174 |
| 2009 | 107 |
| 2010 | 124 |
| 2011 | 107 |
| 2012 | 71 |
| 2013 | 32 |
| 2014 | 23 |
| 2015 | 38 |
| 2016 | 20 |
| 2017 | 18 |
| 2021 | 5 |