| Year | Count |
|---|---|
| 1917 | 11 |
| 1920 | 7 |
| 1921 | 10 |
| 1923 | 5 |
| 1927 | 5 |
| 1935 | 25 |
| 1936 | 33 |
| 1937 | 25 |
| 1938 | 5 |
| 1939 | 16 |
| 1940 | 20 |
| 1941 | 23 |
| 1944 | 10 |
| 1945 | 10 |
| 1946 | 24 |
| 1947 | 39 |
| 1948 | 20 |
| 1949 | 8 |
| 1951 | 33 |
| 1952 | 24 |
| 1953 | 57 |
| 1954 | 21 |
| 1955 | 30 |
| 1956 | 34 |
| 1957 | 43 |
| 1958 | 29 |
| 1959 | 37 |
| 1960 | 28 |
| 1961 | 33 |
| 1962 | 34 |
| 1963 | 43 |
| 1964 | 13 |
| 1965 | 12 |
| 1966 | 52 |
| 1967 | 5 |
| 1968 | 17 |
| 1969 | 26 |
| 1970 | 30 |
| 1971 | 10 |
| 1972 | 22 |
| 1974 | 6 |
| 1975 | 10 |
| 1992 | 10 |