| Year | Count |
|---|---|
| 1911 | 5 |
| 1914 | 6 |
| 1917 | 5 |
| 1918 | 5 |
| 1919 | 7 |
| 1922 | 6 |
| 1924 | 7 |
| 1925 | 7 |
| 1926 | 5 |
| 1928 | 10 |
| 1929 | 9 |
| 1930 | 6 |
| 1931 | 7 |
| 1932 | 12 |
| 1933 | 6 |
| 1934 | 6 |
| 1935 | 10 |
| 1936 | 7 |
| 1938 | 9 |
| 1939 | 8 |
| 1940 | 5 |
| 1945 | 7 |
| 1946 | 5 |
| 1947 | 8 |
| 1948 | 8 |
| 1951 | 6 |
| 1952 | 7 |
| 1954 | 5 |
| 1955 | 7 |
| 1956 | 8 |
| 1957 | 8 |
| 1958 | 12 |
| 1959 | 8 |
| 1960 | 16 |
| 1961 | 16 |
| 1962 | 11 |
| 1963 | 11 |
| 1964 | 6 |
| 1966 | 10 |
| 1967 | 6 |
| 1970 | 5 |
| 1972 | 7 |
| 1975 | 8 |
| 1977 | 8 |
| 1993 | 5 |
| 1996 | 5 |
| 1997 | 5 |
| 1998 | 5 |
| 1999 | 7 |
| 2000 | 7 |
| 2003 | 5 |
| 2005 | 11 |