| Year | Count |
|---|---|
| 1910 | 14 |
| 1911 | 12 |
| 1912 | 6 |
| 1913 | 20 |
| 1914 | 38 |
| 1915 | 87 |
| 1916 | 75 |
| 1917 | 87 |
| 1918 | 231 |
| 1919 | 219 |
| 1920 | 246 |
| 1921 | 214 |
| 1922 | 188 |
| 1923 | 150 |
| 1924 | 158 |
| 1925 | 249 |
| 1926 | 206 |
| 1927 | 229 |
| 1928 | 244 |
| 1929 | 192 |
| 1930 | 194 |
| 1931 | 184 |
| 1932 | 219 |
| 1933 | 124 |
| 1934 | 136 |
| 1935 | 196 |
| 1936 | 175 |
| 1937 | 190 |
| 1938 | 134 |
| 1939 | 161 |
| 1940 | 132 |
| 1941 | 59 |
| 1942 | 90 |
| 1943 | 67 |
| 1944 | 60 |
| 1945 | 45 |
| 1946 | 58 |
| 1947 | 50 |
| 1948 | 78 |
| 1949 | 33 |
| 1950 | 14 |
| 1951 | 12 |
| 1952 | 38 |
| 1953 | 8 |
| 1954 | 5 |
| 1956 | 8 |
| 1962 | 6 |