| Year | Count |
|---|---|
| 1915 | 18 |
| 1916 | 10 |
| 1917 | 27 |
| 1918 | 31 |
| 1919 | 10 |
| 1920 | 33 |
| 1921 | 27 |
| 1922 | 19 |
| 1923 | 28 |
| 1924 | 46 |
| 1925 | 28 |
| 1926 | 32 |
| 1927 | 5 |
| 1928 | 5 |
| 1929 | 40 |
| 1930 | 35 |
| 1931 | 35 |
| 1932 | 14 |
| 1933 | 15 |
| 1934 | 5 |
| 1935 | 12 |
| 1936 | 20 |
| 1937 | 12 |
| 1941 | 24 |
| 1943 | 5 |
| 1946 | 15 |
| 1948 | 14 |
| 1949 | 10 |
| 1950 | 5 |
| 1955 | 5 |
| 1958 | 5 |
| 1962 | 6 |
| 1970 | 5 |
| 1972 | 5 |