| Year | Count |
|---|---|
| 1910 | 10 |
| 1911 | 25 |
| 1912 | 23 |
| 1913 | 17 |
| 1914 | 22 |
| 1915 | 47 |
| 1916 | 36 |
| 1917 | 40 |
| 1918 | 49 |
| 1919 | 54 |
| 1920 | 32 |
| 1921 | 57 |
| 1922 | 26 |
| 1923 | 46 |
| 1924 | 77 |
| 1925 | 90 |
| 1926 | 132 |
| 1927 | 87 |
| 1928 | 84 |
| 1929 | 91 |
| 1930 | 58 |
| 1931 | 89 |
| 1932 | 119 |
| 1933 | 83 |
| 1934 | 116 |
| 1935 | 106 |
| 1936 | 81 |
| 1937 | 75 |
| 1938 | 40 |
| 1939 | 32 |
| 1940 | 101 |
| 1941 | 40 |
| 1942 | 65 |
| 1943 | 58 |
| 1944 | 18 |
| 1945 | 59 |
| 1946 | 61 |
| 1947 | 62 |
| 1948 | 45 |
| 1949 | 31 |
| 1950 | 68 |
| 1951 | 25 |
| 1952 | 24 |
| 1953 | 36 |
| 1954 | 58 |
| 1955 | 43 |
| 1956 | 47 |
| 1957 | 7 |
| 1958 | 27 |
| 1959 | 5 |
| 1960 | 9 |