| Year | Count |
|---|---|
| 1912 | 11 |
| 1913 | 7 |
| 1914 | 11 |
| 1916 | 8 |
| 1917 | 10 |
| 1918 | 10 |
| 1919 | 8 |
| 1920 | 8 |
| 1921 | 9 |
| 1923 | 20 |
| 1925 | 18 |
| 1926 | 12 |
| 1930 | 10 |
| 1931 | 5 |
| 1932 | 7 |
| 1934 | 5 |
| 1935 | 5 |
| 1936 | 9 |
| 1937 | 5 |
| 1938 | 8 |
| 1939 | 6 |
| 1940 | 6 |
| 1941 | 9 |
| 1942 | 6 |
| 1943 | 9 |
| 1945 | 11 |
| 1946 | 9 |
| 1947 | 7 |
| 1948 | 13 |
| 1949 | 10 |
| 1950 | 9 |
| 1951 | 10 |
| 1952 | 7 |
| 1953 | 9 |
| 1954 | 5 |
| 1955 | 8 |
| 1956 | 6 |
| 1957 | 12 |