| Year | Count |
|---|---|
| 1914 | 14 |
| 1915 | 16 |
| 1916 | 25 |
| 1917 | 25 |
| 1919 | 16 |
| 1920 | 20 |
| 1921 | 24 |
| 1922 | 12 |
| 1923 | 28 |
| 1924 | 19 |
| 1926 | 36 |
| 1927 | 23 |
| 1928 | 8 |
| 1930 | 6 |
| 1931 | 7 |
| 1932 | 10 |
| 1935 | 11 |
| 1942 | 7 |
| 1944 | 5 |
| 1951 | 5 |
| 1979 | 6 |
| 1981 | 9 |
| 1982 | 9 |
| 1983 | 5 |
| 1984 | 7 |
| 1987 | 12 |
| 1988 | 7 |
| 1990 | 5 |
| 1992 | 19 |
| 1995 | 13 |
| 1996 | 19 |
| 1997 | 9 |
| 1998 | 24 |
| 2004 | 14 |
| 2005 | 10 |
| 2006 | 17 |
| 2007 | 12 |
| 2014 | 5 |