| Year | Count |
|---|---|
| 1910 | 152 |
| 1911 | 151 |
| 1912 | 288 |
| 1913 | 335 |
| 1914 | 404 |
| 1915 | 651 |
| 1916 | 597 |
| 1917 | 645 |
| 1918 | 698 |
| 1919 | 600 |
| 1920 | 575 |
| 1921 | 528 |
| 1922 | 438 |
| 1923 | 527 |
| 1924 | 528 |
| 1925 | 493 |
| 1926 | 372 |
| 1927 | 378 |
| 1928 | 294 |
| 1929 | 178 |
| 1930 | 145 |
| 1931 | 152 |
| 1932 | 151 |
| 1933 | 97 |
| 1934 | 126 |
| 1935 | 90 |
| 1936 | 80 |
| 1937 | 44 |
| 1938 | 58 |
| 1939 | 42 |
| 1940 | 72 |
| 1941 | 52 |
| 1942 | 39 |
| 1943 | 49 |
| 1944 | 46 |
| 1945 | 37 |
| 1946 | 71 |
| 1947 | 47 |
| 1948 | 41 |
| 1949 | 52 |
| 1950 | 47 |
| 1951 | 27 |
| 1952 | 5 |
| 1953 | 15 |
| 1954 | 17 |
| 1955 | 15 |
| 1956 | 13 |
| 1957 | 32 |
| 1958 | 18 |
| 1959 | 28 |
| 1961 | 8 |
| 1962 | 12 |
| 1963 | 9 |
| 1964 | 6 |
| 1965 | 6 |
| 1966 | 6 |