| Year | Count |
|---|---|
| 1910 | 9 |
| 1911 | 5 |
| 1912 | 8 |
| 1914 | 11 |
| 1915 | 6 |
| 1916 | 6 |
| 1917 | 8 |
| 1918 | 7 |
| 1920 | 5 |
| 1922 | 18 |
| 1924 | 16 |
| 1925 | 34 |
| 1926 | 32 |
| 1927 | 40 |
| 1928 | 50 |
| 1929 | 104 |
| 1930 | 80 |
| 1931 | 31 |
| 1932 | 36 |
| 1933 | 19 |
| 1934 | 13 |
| 1935 | 10 |
| 1936 | 10 |
| 1937 | 9 |
| 1938 | 8 |
| 1939 | 5 |
| 1941 | 7 |
| 1942 | 6 |
| 1943 | 5 |
| 1944 | 6 |
| 1945 | 5 |
| 1947 | 7 |