| Year | Count |
|---|---|
| 1914 | 5 |
| 1915 | 10 |
| 1916 | 7 |
| 1917 | 5 |
| 1918 | 10 |
| 1919 | 10 |
| 1920 | 30 |
| 1921 | 12 |
| 1922 | 17 |
| 1923 | 19 |
| 1924 | 12 |
| 1925 | 12 |
| 1927 | 5 |
| 1928 | 23 |
| 1929 | 5 |
| 1930 | 12 |
| 1932 | 6 |
| 1934 | 5 |
| 1935 | 10 |
| 1937 | 5 |
| 1944 | 5 |
| 1946 | 10 |
| 1947 | 12 |
| 1948 | 10 |
| 1949 | 5 |
| 1950 | 17 |
| 1951 | 31 |
| 1952 | 43 |
| 1953 | 12 |
| 1954 | 15 |
| 1955 | 38 |
| 1956 | 56 |
| 1957 | 5 |
| 1958 | 17 |
| 1959 | 5 |
| 1960 | 6 |
| 1961 | 11 |
| 1962 | 23 |
| 1963 | 33 |
| 1964 | 19 |
| 1965 | 14 |
| 1966 | 15 |
| 1968 | 5 |
| 1969 | 5 |
| 1970 | 5 |
| 1971 | 6 |
| 1973 | 10 |
| 1974 | 5 |