| Year | Count |
|---|---|
| 1910 | 6 |
| 1911 | 21 |
| 1912 | 44 |
| 1913 | 48 |
| 1914 | 80 |
| 1915 | 98 |
| 1916 | 119 |
| 1917 | 122 |
| 1918 | 154 |
| 1919 | 245 |
| 1920 | 158 |
| 1921 | 146 |
| 1922 | 175 |
| 1923 | 148 |
| 1924 | 93 |
| 1925 | 153 |
| 1926 | 141 |
| 1927 | 107 |
| 1928 | 91 |
| 1929 | 127 |
| 1930 | 155 |
| 1931 | 86 |
| 1932 | 65 |
| 1933 | 82 |
| 1934 | 106 |
| 1935 | 95 |
| 1936 | 46 |
| 1937 | 40 |
| 1938 | 55 |
| 1939 | 68 |
| 1940 | 50 |
| 1941 | 28 |
| 1942 | 53 |
| 1943 | 31 |
| 1944 | 54 |
| 1945 | 19 |
| 1946 | 37 |
| 1947 | 44 |
| 1948 | 21 |
| 1949 | 12 |
| 1950 | 33 |
| 1952 | 10 |
| 1954 | 20 |
| 1955 | 18 |
| 1956 | 10 |
| 1958 | 5 |
| 1959 | 20 |