| Year | Count |
|---|---|
| 1911 | 6 |
| 1912 | 8 |
| 1913 | 17 |
| 1914 | 13 |
| 1915 | 16 |
| 1916 | 13 |
| 1917 | 20 |
| 1918 | 14 |
| 1919 | 13 |
| 1920 | 13 |
| 1921 | 16 |
| 1922 | 22 |
| 1923 | 13 |
| 1924 | 21 |
| 1925 | 10 |
| 1926 | 16 |
| 1927 | 9 |
| 1928 | 11 |
| 1929 | 13 |
| 1930 | 6 |
| 1931 | 10 |
| 1932 | 7 |
| 1936 | 5 |
| 1938 | 6 |
| 1953 | 6 |
| 1955 | 5 |
| 1956 | 6 |
| 1957 | 10 |
| 1958 | 6 |
| 1960 | 8 |
| 1961 | 6 |
| 1962 | 6 |
| 1964 | 12 |
| 1965 | 5 |
| 1966 | 7 |
| 1968 | 7 |
| 1972 | 6 |
| 1974 | 5 |
| 1975 | 5 |
| 1976 | 6 |