| Year | Count |
|---|---|
| 1912 | 6 |
| 1914 | 5 |
| 1915 | 5 |
| 1916 | 6 |
| 1917 | 7 |
| 1918 | 10 |
| 1919 | 9 |
| 1920 | 5 |
| 1922 | 9 |
| 1923 | 6 |
| 1925 | 8 |
| 1926 | 7 |
| 1927 | 6 |
| 1928 | 5 |
| 1931 | 9 |
| 1934 | 5 |
| 1935 | 5 |
| 1937 | 5 |
| 1940 | 6 |
| 1945 | 5 |
| 1946 | 6 |
| 1947 | 5 |
| 1952 | 5 |
| 1953 | 5 |
| 1954 | 6 |
| 1956 | 5 |
| 1961 | 5 |
| 1962 | 7 |
| 1965 | 5 |
| 1968 | 5 |
| 1969 | 6 |
| 1970 | 9 |
| 1973 | 6 |
| 1978 | 5 |
| 1980 | 7 |
| 1981 | 5 |
| 1983 | 7 |
| 1986 | 9 |
| 1988 | 6 |
| 1991 | 5 |
| 2001 | 5 |
| 2003 | 5 |
| 2009 | 5 |
| 2019 | 8 |