| Year | Count |
|---|---|
| 1913 | 5 |
| 1914 | 10 |
| 1915 | 11 |
| 1916 | 15 |
| 1917 | 14 |
| 1918 | 30 |
| 1919 | 24 |
| 1920 | 11 |
| 1921 | 23 |
| 1922 | 14 |
| 1923 | 7 |
| 1924 | 10 |
| 1925 | 42 |
| 1926 | 26 |
| 1927 | 18 |
| 1928 | 44 |
| 1929 | 53 |
| 1930 | 34 |
| 1931 | 30 |
| 1932 | 22 |
| 1933 | 47 |
| 1934 | 31 |
| 1935 | 15 |
| 1936 | 37 |
| 1937 | 35 |
| 1938 | 25 |
| 1939 | 30 |
| 1940 | 22 |
| 1941 | 38 |
| 1942 | 9 |
| 1943 | 30 |
| 1944 | 22 |
| 1945 | 24 |
| 1946 | 30 |
| 1947 | 18 |
| 1948 | 22 |
| 1949 | 23 |
| 1950 | 9 |
| 1951 | 10 |
| 1952 | 16 |
| 1953 | 13 |
| 1954 | 7 |
| 1955 | 11 |
| 1956 | 31 |
| 1957 | 6 |
| 1958 | 8 |
| 1959 | 6 |
| 1960 | 5 |