| Year | Count |
|---|---|
| 1910 | 26 |
| 1911 | 34 |
| 1912 | 119 |
| 1913 | 147 |
| 1914 | 248 |
| 1915 | 312 |
| 1916 | 383 |
| 1917 | 465 |
| 1918 | 529 |
| 1919 | 578 |
| 1920 | 689 |
| 1921 | 725 |
| 1922 | 757 |
| 1923 | 747 |
| 1924 | 811 |
| 1925 | 698 |
| 1926 | 676 |
| 1927 | 582 |
| 1928 | 573 |
| 1929 | 473 |
| 1930 | 454 |
| 1931 | 347 |
| 1932 | 257 |
| 1933 | 226 |
| 1934 | 203 |
| 1935 | 150 |
| 1936 | 162 |
| 1937 | 147 |
| 1938 | 87 |
| 1939 | 106 |
| 1940 | 56 |
| 1941 | 59 |
| 1942 | 65 |
| 1943 | 55 |
| 1944 | 33 |
| 1945 | 33 |
| 1946 | 29 |
| 1947 | 42 |
| 1948 | 24 |
| 1949 | 16 |
| 1950 | 16 |
| 1951 | 10 |
| 1952 | 17 |
| 1953 | 16 |
| 1954 | 10 |
| 1955 | 6 |
| 1956 | 12 |
| 1957 | 27 |
| 1959 | 10 |
| 1960 | 6 |
| 1961 | 6 |
| 1965 | 5 |