| Year | Count |
|---|---|
| 1910 | 12 |
| 1911 | 12 |
| 1912 | 16 |
| 1913 | 15 |
| 1914 | 21 |
| 1915 | 22 |
| 1916 | 23 |
| 1917 | 33 |
| 1918 | 38 |
| 1919 | 35 |
| 1920 | 37 |
| 1921 | 32 |
| 1922 | 50 |
| 1923 | 78 |
| 1924 | 64 |
| 1925 | 68 |
| 1926 | 48 |
| 1927 | 44 |
| 1928 | 44 |
| 1929 | 36 |
| 1930 | 40 |
| 1931 | 20 |
| 1932 | 22 |
| 1933 | 12 |
| 1934 | 16 |
| 1935 | 13 |
| 1936 | 14 |
| 1937 | 12 |
| 1938 | 17 |
| 1939 | 6 |
| 1940 | 11 |
| 1941 | 14 |
| 1942 | 18 |
| 1943 | 13 |
| 1944 | 12 |
| 1945 | 12 |
| 1946 | 8 |
| 1947 | 6 |
| 1949 | 8 |
| 1950 | 8 |
| 1951 | 5 |
| 1952 | 6 |
| 1953 | 8 |
| 1957 | 10 |