| Year | Count |
|---|---|
| 1910 | 6 |
| 1911 | 6 |
| 1912 | 7 |
| 1913 | 7 |
| 1914 | 8 |
| 1915 | 15 |
| 1916 | 10 |
| 1917 | 19 |
| 1918 | 12 |
| 1919 | 8 |
| 1920 | 15 |
| 1921 | 16 |
| 1922 | 42 |
| 1923 | 24 |
| 1924 | 32 |
| 1925 | 24 |
| 1926 | 22 |
| 1928 | 22 |
| 1929 | 14 |
| 1930 | 18 |
| 1931 | 7 |
| 1932 | 11 |
| 1933 | 6 |
| 1935 | 5 |
| 1936 | 7 |
| 1937 | 6 |
| 1938 | 6 |
| 1939 | 7 |
| 1940 | 6 |
| 1943 | 7 |
| 1945 | 6 |
| 1947 | 5 |
| 1949 | 8 |
| 1971 | 7 |
| 1973 | 5 |
| 1976 | 10 |