| Year | Count |
|---|---|
| 1912 | 5 |
| 1913 | 10 |
| 1914 | 30 |
| 1915 | 56 |
| 1916 | 88 |
| 1917 | 186 |
| 1918 | 160 |
| 1919 | 230 |
| 1920 | 249 |
| 1921 | 250 |
| 1922 | 210 |
| 1923 | 240 |
| 1924 | 255 |
| 1925 | 254 |
| 1926 | 190 |
| 1927 | 210 |
| 1928 | 184 |
| 1929 | 207 |
| 1930 | 177 |
| 1931 | 158 |
| 1932 | 170 |
| 1933 | 139 |
| 1934 | 203 |
| 1935 | 234 |
| 1936 | 222 |
| 1937 | 153 |
| 1938 | 185 |
| 1939 | 137 |
| 1940 | 134 |
| 1941 | 79 |
| 1942 | 106 |
| 1943 | 83 |
| 1944 | 60 |
| 1945 | 72 |
| 1946 | 74 |
| 1947 | 51 |
| 1948 | 91 |
| 1949 | 51 |
| 1950 | 28 |
| 1951 | 51 |
| 1952 | 30 |
| 1953 | 34 |
| 1954 | 55 |
| 1955 | 58 |
| 1956 | 39 |
| 1957 | 10 |
| 1958 | 18 |
| 1959 | 24 |
| 1960 | 21 |
| 1961 | 10 |
| 1962 | 10 |
| 1963 | 15 |
| 1966 | 5 |
| 1968 | 5 |
| 1970 | 10 |