| Year | Count |
|---|---|
| 1910 | 5 |
| 1911 | 11 |
| 1912 | 44 |
| 1913 | 107 |
| 1914 | 92 |
| 1915 | 178 |
| 1916 | 171 |
| 1917 | 284 |
| 1918 | 243 |
| 1919 | 246 |
| 1920 | 287 |
| 1921 | 259 |
| 1922 | 271 |
| 1923 | 231 |
| 1924 | 280 |
| 1925 | 293 |
| 1926 | 249 |
| 1927 | 222 |
| 1928 | 219 |
| 1929 | 176 |
| 1930 | 168 |
| 1931 | 142 |
| 1932 | 143 |
| 1933 | 110 |
| 1934 | 86 |
| 1935 | 133 |
| 1936 | 111 |
| 1937 | 105 |
| 1938 | 114 |
| 1939 | 84 |
| 1940 | 99 |
| 1941 | 66 |
| 1942 | 76 |
| 1943 | 83 |
| 1944 | 74 |
| 1945 | 46 |
| 1946 | 40 |
| 1947 | 59 |
| 1948 | 95 |
| 1949 | 93 |
| 1950 | 48 |
| 1951 | 37 |
| 1952 | 55 |
| 1953 | 31 |
| 1954 | 6 |
| 1955 | 59 |
| 1956 | 30 |
| 1957 | 12 |
| 1958 | 12 |
| 1959 | 17 |
| 1961 | 5 |
| 1963 | 5 |
| 1964 | 5 |
| 1966 | 12 |
| 1973 | 6 |