| Year | Count |
|---|---|
| 1915 | 8 |
| 1917 | 9 |
| 1919 | 7 |
| 1920 | 14 |
| 1921 | 7 |
| 1922 | 28 |
| 1923 | 10 |
| 1924 | 10 |
| 1925 | 16 |
| 1926 | 16 |
| 1927 | 14 |
| 1928 | 14 |
| 1929 | 18 |
| 1932 | 8 |
| 1933 | 9 |
| 1934 | 7 |
| 1935 | 5 |
| 1938 | 7 |
| 1942 | 9 |
| 1943 | 12 |
| 1944 | 5 |
| 1946 | 5 |
| 1947 | 10 |
| 1948 | 13 |
| 1949 | 15 |
| 1951 | 10 |
| 1952 | 7 |
| 1953 | 7 |
| 1954 | 20 |
| 1955 | 7 |
| 1956 | 7 |
| 1957 | 30 |
| 1958 | 24 |
| 1959 | 22 |
| 1960 | 20 |
| 1961 | 6 |
| 1963 | 10 |
| 1965 | 9 |
| 1966 | 9 |
| 1967 | 8 |
| 1968 | 7 |
| 1969 | 6 |
| 1970 | 9 |
| 1971 | 6 |
| 1973 | 5 |
| 1979 | 14 |