| Year | Count |
|---|---|
| 1919 | 6 |
| 1920 | 7 |
| 1920 | 13 |
| 1921 | 5 |
| 1922 | 6 |
| 1922 | 7 |
| 1923 | 7 |
| 1924 | 10 |
| 1925 | 6 |
| 1925 | 9 |
| 1926 | 6 |
| 1928 | 8 |
| 1929 | 9 |
| 1930 | 10 |
| 1931 | 22 |
| 1934 | 7 |
| 1940 | 5 |
| 1941 | 6 |
| 1942 | 5 |
| 1943 | 11 |
| 1944 | 9 |
| 1945 | 11 |
| 1946 | 6 |
| 1947 | 21 |
| 1948 | 7 |
| 1949 | 7 |
| 1954 | 15 |
| 1955 | 21 |
| 1956 | 22 |
| 1959 | 12 |
| 1962 | 12 |
| 1964 | 16 |
| 1965 | 10 |
| 1967 | 5 |
| 1968 | 12 |
| 1969 | 5 |
| 1970 | 5 |
| 1972 | 6 |
| 1973 | 6 |
| 1974 | 5 |
| 1979 | 10 |
| 1990 | 6 |
| 1991 | 7 |
| 1993 | 6 |
| 1994 | 5 |
| 1995 | 6 |
| 1997 | 5 |
| 1999 | 5 |
| 2008 | 6 |
| 2010 | 7 |