| Year | Count |
|---|---|
| 1910 | 10 |
| 1911 | 10 |
| 1912 | 42 |
| 1913 | 18 |
| 1914 | 152 |
| 1915 | 132 |
| 1916 | 187 |
| 1917 | 222 |
| 1918 | 144 |
| 1919 | 124 |
| 1920 | 158 |
| 1921 | 187 |
| 1922 | 226 |
| 1923 | 159 |
| 1924 | 191 |
| 1925 | 186 |
| 1926 | 176 |
| 1927 | 67 |
| 1928 | 179 |
| 1929 | 139 |
| 1930 | 81 |
| 1931 | 92 |
| 1932 | 96 |
| 1933 | 100 |
| 1934 | 80 |
| 1935 | 63 |
| 1936 | 67 |
| 1937 | 55 |
| 1938 | 98 |
| 1939 | 85 |
| 1940 | 66 |
| 1941 | 63 |
| 1942 | 60 |
| 1943 | 106 |
| 1944 | 40 |
| 1945 | 46 |
| 1946 | 23 |
| 1947 | 58 |
| 1948 | 53 |
| 1949 | 62 |
| 1950 | 57 |
| 1951 | 22 |
| 1952 | 33 |
| 1953 | 12 |
| 1954 | 27 |
| 1955 | 6 |
| 1956 | 28 |
| 1957 | 41 |
| 1958 | 6 |
| 1959 | 6 |
| 1962 | 9 |
| 1963 | 12 |
| 1967 | 5 |
| 1968 | 5 |
| 1973 | 5 |