| Year | Count |
|---|---|
| 1912 | 20 |
| 1913 | 6 |
| 1914 | 6 |
| 1914 | 32 |
| 1915 | 13 |
| 1915 | 36 |
| 1916 | 19 |
| 1916 | 53 |
| 1917 | 43 |
| 1917 | 27 |
| 1918 | 27 |
| 1918 | 53 |
| 1919 | 36 |
| 1919 | 58 |
| 1920 | 16 |
| 1920 | 40 |
| 1921 | 27 |
| 1921 | 78 |
| 1922 | 37 |
| 1922 | 40 |
| 1923 | 16 |
| 1923 | 72 |
| 1924 | 31 |
| 1924 | 116 |
| 1925 | 19 |
| 1925 | 72 |
| 1926 | 21 |
| 1926 | 44 |
| 1927 | 13 |
| 1927 | 66 |
| 1928 | 23 |
| 1928 | 40 |
| 1929 | 6 |
| 1929 | 67 |
| 1930 | 19 |
| 1930 | 55 |
| 1931 | 10 |
| 1931 | 48 |
| 1932 | 29 |
| 1933 | 6 |
| 1933 | 17 |
| 1934 | 7 |
| 1934 | 16 |
| 1935 | 15 |
| 1936 | 27 |
| 1937 | 30 |
| 1938 | 6 |
| 1939 | 7 |
| 1940 | 5 |
| 1941 | 42 |
| 1942 | 5 |
| 1942 | 21 |
| 1943 | 26 |
| 1944 | 24 |
| 1945 | 21 |
| 1946 | 27 |
| 1947 | 18 |
| 1948 | 18 |
| 1949 | 15 |
| 1950 | 21 |