| Year | Count |
|---|---|
| 1910 | 5 |
| 1911 | 5 |
| 1912 | 10 |
| 1913 | 12 |
| 1914 | 18 |
| 1915 | 23 |
| 1916 | 21 |
| 1917 | 31 |
| 1918 | 20 |
| 1919 | 31 |
| 1920 | 23 |
| 1921 | 23 |
| 1922 | 20 |
| 1923 | 24 |
| 1925 | 21 |
| 1926 | 22 |
| 1927 | 22 |
| 1928 | 12 |
| 1929 | 8 |
| 1930 | 9 |
| 1931 | 8 |
| 1932 | 8 |
| 1933 | 10 |
| 1935 | 7 |
| 1936 | 9 |
| 1937 | 12 |
| 1939 | 6 |
| 1941 | 8 |
| 1942 | 5 |
| 1943 | 6 |
| 1944 | 10 |
| 1946 | 6 |
| 1947 | 6 |
| 1950 | 6 |
| 1951 | 5 |
| 1957 | 5 |
| 1960 | 5 |