| Year | Count |
|---|---|
| 1910 | 5 |
| 1911 | 5 |
| 1912 | 15 |
| 1913 | 9 |
| 1914 | 11 |
| 1915 | 19 |
| 1916 | 16 |
| 1917 | 21 |
| 1918 | 38 |
| 1919 | 27 |
| 1920 | 36 |
| 1921 | 29 |
| 1922 | 41 |
| 1923 | 29 |
| 1924 | 37 |
| 1925 | 29 |
| 1926 | 36 |
| 1927 | 27 |
| 1928 | 30 |
| 1929 | 41 |
| 1930 | 26 |
| 1931 | 20 |
| 1932 | 18 |
| 1933 | 16 |
| 1934 | 11 |
| 1935 | 12 |
| 1936 | 10 |
| 1937 | 7 |
| 1938 | 6 |
| 1939 | 10 |
| 1940 | 6 |
| 1941 | 5 |
| 1942 | 10 |
| 1944 | 6 |
| 1945 | 7 |
| 1946 | 6 |
| 1949 | 5 |
| 1953 | 5 |