| Year | Count |
|---|---|
| 1910 | 15 |
| 1911 | 11 |
| 1912 | 42 |
| 1913 | 33 |
| 1914 | 93 |
| 1915 | 144 |
| 1916 | 168 |
| 1917 | 225 |
| 1918 | 263 |
| 1919 | 242 |
| 1920 | 225 |
| 1921 | 287 |
| 1922 | 339 |
| 1923 | 356 |
| 1924 | 344 |
| 1925 | 274 |
| 1926 | 230 |
| 1927 | 247 |
| 1928 | 196 |
| 1929 | 241 |
| 1930 | 203 |
| 1931 | 127 |
| 1932 | 134 |
| 1933 | 101 |
| 1934 | 114 |
| 1935 | 97 |
| 1936 | 106 |
| 1937 | 82 |
| 1938 | 88 |
| 1939 | 34 |
| 1940 | 67 |
| 1941 | 47 |
| 1942 | 58 |
| 1943 | 37 |
| 1944 | 58 |
| 1945 | 30 |
| 1946 | 71 |
| 1947 | 62 |
| 1948 | 53 |
| 1949 | 69 |
| 1950 | 59 |
| 1951 | 40 |
| 1952 | 32 |
| 1953 | 31 |
| 1954 | 6 |
| 1955 | 19 |
| 1956 | 7 |
| 1957 | 28 |
| 1958 | 21 |
| 1960 | 10 |
| 1961 | 5 |
| 1964 | 11 |
| 1965 | 5 |
| 1970 | 5 |
| 1972 | 5 |