| Year | Count |
|---|---|
| 1914 | 8 |
| 1915 | 24 |
| 1916 | 26 |
| 1917 | 28 |
| 1918 | 70 |
| 1919 | 54 |
| 1920 | 75 |
| 1921 | 67 |
| 1922 | 42 |
| 1923 | 34 |
| 1924 | 61 |
| 1925 | 72 |
| 1926 | 49 |
| 1927 | 40 |
| 1928 | 41 |
| 1929 | 47 |
| 1930 | 57 |
| 1931 | 24 |
| 1932 | 20 |
| 1933 | 68 |
| 1934 | 64 |
| 1935 | 46 |
| 1936 | 29 |
| 1937 | 35 |
| 1938 | 27 |
| 1939 | 47 |
| 1940 | 52 |
| 1941 | 36 |
| 1942 | 30 |
| 1943 | 27 |
| 1944 | 21 |
| 1945 | 41 |
| 1946 | 18 |
| 1947 | 32 |
| 1948 | 21 |
| 1949 | 23 |
| 1950 | 38 |
| 1951 | 7 |
| 1952 | 47 |
| 1953 | 10 |
| 1954 | 5 |
| 1955 | 11 |
| 1956 | 5 |
| 1957 | 6 |
| 1961 | 6 |
| 1963 | 16 |
| 1968 | 12 |
| 1969 | 10 |