| Year | Count |
|---|---|
| 1910 | 14 |
| 1911 | 17 |
| 1912 | 26 |
| 1913 | 29 |
| 1914 | 90 |
| 1915 | 136 |
| 1916 | 188 |
| 1917 | 170 |
| 1918 | 259 |
| 1919 | 198 |
| 1920 | 292 |
| 1921 | 247 |
| 1922 | 259 |
| 1923 | 314 |
| 1924 | 307 |
| 1925 | 367 |
| 1926 | 341 |
| 1927 | 364 |
| 1928 | 384 |
| 1929 | 325 |
| 1930 | 218 |
| 1931 | 185 |
| 1932 | 218 |
| 1933 | 171 |
| 1934 | 162 |
| 1935 | 175 |
| 1936 | 183 |
| 1937 | 124 |
| 1938 | 122 |
| 1939 | 98 |
| 1940 | 110 |
| 1941 | 57 |
| 1942 | 44 |
| 1943 | 56 |
| 1944 | 30 |
| 1945 | 27 |
| 1946 | 62 |
| 1947 | 11 |
| 1948 | 24 |
| 1949 | 46 |
| 1950 | 22 |
| 1951 | 33 |
| 1952 | 34 |
| 1953 | 30 |
| 1954 | 23 |
| 1955 | 21 |
| 1956 | 20 |
| 1959 | 6 |
| 1960 | 20 |