| Year | Count |
|---|---|
| 1910 | 18 |
| 1911 | 22 |
| 1912 | 7 |
| 1913 | 37 |
| 1914 | 90 |
| 1915 | 62 |
| 1916 | 122 |
| 1917 | 128 |
| 1918 | 107 |
| 1919 | 117 |
| 1920 | 128 |
| 1921 | 139 |
| 1922 | 118 |
| 1923 | 103 |
| 1924 | 143 |
| 1925 | 196 |
| 1926 | 219 |
| 1927 | 268 |
| 1928 | 208 |
| 1929 | 201 |
| 1930 | 193 |
| 1931 | 232 |
| 1932 | 221 |
| 1933 | 231 |
| 1934 | 175 |
| 1935 | 225 |
| 1936 | 182 |
| 1937 | 171 |
| 1938 | 145 |
| 1939 | 132 |
| 1940 | 149 |
| 1941 | 97 |
| 1942 | 93 |
| 1943 | 101 |
| 1944 | 93 |
| 1945 | 72 |
| 1946 | 63 |
| 1947 | 79 |
| 1948 | 69 |
| 1949 | 103 |
| 1950 | 66 |
| 1951 | 43 |
| 1952 | 73 |
| 1953 | 68 |
| 1954 | 54 |
| 1955 | 48 |
| 1956 | 75 |
| 1957 | 45 |
| 1958 | 15 |
| 1959 | 16 |
| 1960 | 13 |
| 1961 | 18 |
| 1962 | 15 |
| 1963 | 22 |
| 1965 | 6 |
| 1966 | 6 |