| Year | Count |
|---|---|
| 1910 | 8 |
| 1911 | 10 |
| 1912 | 23 |
| 1913 | 26 |
| 1914 | 39 |
| 1915 | 31 |
| 1916 | 27 |
| 1917 | 39 |
| 1918 | 40 |
| 1919 | 33 |
| 1920 | 51 |
| 1921 | 40 |
| 1922 | 41 |
| 1923 | 26 |
| 1924 | 20 |
| 1925 | 26 |
| 1926 | 27 |
| 1927 | 23 |
| 1928 | 31 |
| 1929 | 24 |
| 1930 | 19 |
| 1931 | 16 |
| 1932 | 19 |
| 1933 | 13 |
| 1934 | 14 |
| 1935 | 11 |
| 1936 | 17 |
| 1937 | 8 |
| 1938 | 15 |
| 1939 | 12 |
| 1940 | 12 |
| 1941 | 10 |
| 1942 | 10 |
| 1943 | 11 |
| 1946 | 14 |
| 1947 | 7 |
| 1948 | 6 |
| 1949 | 8 |
| 1950 | 7 |
| 1953 | 12 |
| 1954 | 5 |
| 1957 | 6 |
| 1958 | 6 |
| 1959 | 5 |
| 1960 | 6 |
| 1962 | 6 |
| 1965 | 7 |
| 1966 | 6 |
| 1967 | 5 |
| 2002 | 6 |