| Year | Count |
|---|---|
| 1911 | 10 |
| 1912 | 5 |
| 1913 | 11 |
| 1914 | 8 |
| 1915 | 50 |
| 1916 | 49 |
| 1917 | 43 |
| 1918 | 20 |
| 1919 | 73 |
| 1920 | 51 |
| 1921 | 47 |
| 1922 | 70 |
| 1923 | 64 |
| 1924 | 56 |
| 1925 | 78 |
| 1926 | 68 |
| 1927 | 77 |
| 1928 | 89 |
| 1929 | 104 |
| 1930 | 92 |
| 1931 | 62 |
| 1932 | 32 |
| 1933 | 36 |
| 1934 | 60 |
| 1935 | 56 |
| 1936 | 73 |
| 1937 | 27 |
| 1938 | 21 |
| 1939 | 33 |
| 1940 | 43 |
| 1941 | 52 |
| 1942 | 72 |
| 1943 | 60 |
| 1944 | 51 |
| 1945 | 41 |
| 1946 | 61 |
| 1947 | 39 |
| 1948 | 42 |
| 1949 | 61 |
| 1950 | 10 |
| 1952 | 33 |
| 1953 | 44 |
| 1954 | 62 |
| 1955 | 32 |
| 1956 | 46 |
| 1957 | 16 |
| 1958 | 20 |
| 1959 | 36 |
| 1960 | 14 |
| 1961 | 10 |
| 1963 | 16 |
| 1964 | 32 |
| 1965 | 12 |
| 1966 | 10 |
| 1968 | 16 |
| 1975 | 5 |
| 1981 | 6 |