| Year | Count |
|---|---|
| 1910 | 21 |
| 1912 | 32 |
| 1913 | 17 |
| 1914 | 38 |
| 1915 | 62 |
| 1916 | 86 |
| 1917 | 104 |
| 1918 | 129 |
| 1919 | 145 |
| 1920 | 125 |
| 1921 | 117 |
| 1922 | 111 |
| 1923 | 68 |
| 1924 | 48 |
| 1925 | 89 |
| 1926 | 50 |
| 1927 | 104 |
| 1928 | 51 |
| 1929 | 56 |
| 1930 | 41 |
| 1931 | 49 |
| 1932 | 42 |
| 1933 | 36 |
| 1934 | 66 |
| 1935 | 30 |
| 1936 | 49 |
| 1937 | 24 |
| 1938 | 42 |
| 1939 | 30 |
| 1940 | 29 |
| 1941 | 11 |
| 1942 | 59 |
| 1943 | 49 |
| 1944 | 16 |
| 1945 | 37 |
| 1946 | 22 |
| 1947 | 36 |
| 1948 | 20 |
| 1949 | 36 |
| 1950 | 5 |
| 1951 | 6 |
| 1952 | 7 |
| 1953 | 17 |
| 1954 | 5 |
| 1956 | 5 |
| 1973 | 6 |