| Year | Count |
|---|---|
| 1913 | 6 |
| 1919 | 7 |
| 1920 | 6 |
| 1922 | 12 |
| 1925 | 12 |
| 1926 | 11 |
| 1927 | 5 |
| 1928 | 13 |
| 1929 | 10 |
| 1940 | 7 |
| 1943 | 9 |
| 1944 | 13 |
| 1945 | 9 |
| 1946 | 7 |
| 1948 | 9 |
| 1949 | 8 |
| 1955 | 15 |
| 1956 | 20 |
| 1958 | 10 |
| 1960 | 12 |
| 1965 | 10 |
| 1971 | 5 |
| 1972 | 5 |
| 1973 | 7 |
| 1976 | 6 |
| 1978 | 6 |
| 1979 | 10 |
| 1980 | 6 |
| 1982 | 6 |
| 1983 | 5 |
| 1984 | 6 |
| 1985 | 5 |
| 1986 | 7 |
| 1987 | 7 |
| 1989 | 7 |
| 1990 | 5 |
| 1991 | 9 |
| 1992 | 6 |
| 1993 | 10 |
| 1994 | 5 |
| 1995 | 11 |
| 1996 | 6 |
| 2001 | 22 |
| 2007 | 6 |
| 2011 | 10 |
| 2012 | 10 |
| 2013 | 10 |