| Year | Count |
|---|---|
| 1910 | 7 |
| 1911 | 24 |
| 1912 | 140 |
| 1913 | 182 |
| 1914 | 242 |
| 1915 | 321 |
| 1916 | 376 |
| 1917 | 372 |
| 1918 | 384 |
| 1919 | 342 |
| 1920 | 388 |
| 1921 | 328 |
| 1922 | 314 |
| 1923 | 264 |
| 1924 | 315 |
| 1925 | 264 |
| 1926 | 286 |
| 1927 | 248 |
| 1928 | 154 |
| 1929 | 190 |
| 1930 | 173 |
| 1931 | 154 |
| 1932 | 120 |
| 1933 | 74 |
| 1934 | 133 |
| 1935 | 106 |
| 1936 | 102 |
| 1937 | 56 |
| 1938 | 80 |
| 1939 | 95 |
| 1940 | 72 |
| 1941 | 49 |
| 1942 | 124 |
| 1943 | 53 |
| 1944 | 40 |
| 1945 | 77 |
| 1946 | 52 |
| 1947 | 60 |
| 1948 | 22 |
| 1949 | 38 |
| 1950 | 17 |
| 1951 | 5 |
| 1953 | 7 |
| 1954 | 21 |
| 1955 | 28 |
| 1956 | 14 |
| 1957 | 10 |
| 1960 | 17 |