| Year | Count |
|---|---|
| 1911 | 7 |
| 1912 | 6 |
| 1914 | 5 |
| 1915 | 14 |
| 1916 | 7 |
| 1917 | 14 |
| 1918 | 10 |
| 1920 | 11 |
| 1921 | 8 |
| 1922 | 24 |
| 1923 | 14 |
| 1924 | 12 |
| 1925 | 24 |
| 1926 | 14 |
| 1930 | 10 |
| 1932 | 6 |
| 1939 | 5 |
| 1984 | 7 |
| 1991 | 6 |
| 1993 | 7 |
| 1994 | 6 |
| 1995 | 10 |
| 1997 | 5 |
| 1998 | 5 |
| 1999 | 13 |
| 2001 | 10 |
| 2002 | 7 |
| 2003 | 7 |
| 2004 | 8 |
| 2006 | 6 |
| 2008 | 8 |
| 2009 | 5 |
| 2010 | 9 |
| 2011 | 5 |
| 2012 | 9 |