| Year | Count |
|---|---|
| 1912 | 8 |
| 1913 | 17 |
| 1914 | 21 |
| 1915 | 22 |
| 1916 | 18 |
| 1917 | 25 |
| 1918 | 18 |
| 1919 | 17 |
| 1920 | 20 |
| 1921 | 24 |
| 1922 | 21 |
| 1923 | 19 |
| 1924 | 26 |
| 1925 | 26 |
| 1926 | 15 |
| 1927 | 23 |
| 1928 | 20 |
| 1929 | 17 |
| 1930 | 23 |
| 1931 | 14 |
| 1932 | 8 |
| 1933 | 9 |
| 1934 | 6 |
| 1935 | 6 |
| 1936 | 9 |
| 1937 | 7 |
| 1938 | 6 |
| 1940 | 7 |
| 1942 | 5 |
| 1947 | 7 |
| 1949 | 6 |
| 1951 | 10 |
| 1953 | 5 |
| 1954 | 12 |
| 1957 | 5 |
| 1958 | 5 |
| 1959 | 5 |
| 1961 | 5 |
| 1962 | 9 |
| 1963 | 9 |
| 1964 | 8 |
| 1965 | 7 |
| 1966 | 7 |
| 1967 | 7 |
| 1968 | 7 |
| 1969 | 7 |
| 1971 | 8 |
| 1972 | 9 |
| 1974 | 5 |
| 1976 | 5 |
| 1980 | 6 |
| 1981 | 5 |
| 1992 | 7 |