| Year | Count |
|---|---|
| 1912 | 5 |
| 1915 | 6 |
| 1916 | 6 |
| 1916 | 5 |
| 1917 | 11 |
| 1918 | 6 |
| 1920 | 6 |
| 1920 | 13 |
| 1921 | 7 |
| 1922 | 5 |
| 1924 | 6 |
| 1928 | 7 |
| 1930 | 5 |
| 1931 | 5 |
| 1932 | 8 |
| 1936 | 6 |
| 1943 | 6 |
| 1943 | 7 |
| 1950 | 15 |
| 1952 | 5 |
| 1952 | 5 |
| 1953 | 15 |
| 1955 | 14 |
| 1956 | 5 |
| 1958 | 10 |
| 1960 | 12 |
| 1961 | 30 |
| 1962 | 23 |
| 1962 | 10 |
| 1963 | 15 |
| 1966 | 11 |
| 1967 | 22 |
| 1968 | 34 |
| 1969 | 10 |
| 1970 | 12 |
| 1972 | 15 |
| 1973 | 10 |
| 1974 | 8 |
| 1976 | 5 |
| 1978 | 5 |
| 1983 | 5 |
| 1987 | 18 |
| 1988 | 31 |
| 1989 | 20 |
| 1990 | 70 |
| 1991 | 26 |
| 1992 | 11 |
| 1993 | 36 |
| 1995 | 66 |
| 1996 | 45 |
| 1997 | 57 |
| 1998 | 5 |
| 1999 | 11 |
| 2000 | 6 |
| 2001 | 10 |
| 2002 | 12 |
| 2003 | 17 |
| 2005 | 12 |
| 2006 | 12 |
| 2008 | 5 |
| 2010 | 5 |