| Year | Count |
|---|---|
| 1919 | 5 |
| 1924 | 11 |
| 1927 | 17 |
| 1928 | 8 |
| 1929 | 27 |
| 1930 | 10 |
| 1931 | 9 |
| 1932 | 8 |
| 1933 | 26 |
| 1934 | 12 |
| 1935 | 14 |
| 1936 | 11 |
| 1937 | 14 |
| 1938 | 5 |
| 1939 | 7 |
| 1940 | 14 |
| 1942 | 18 |
| 1943 | 32 |
| 1946 | 14 |
| 1947 | 12 |
| 1948 | 10 |
| 1949 | 15 |
| 1950 | 15 |
| 1951 | 16 |
| 1952 | 18 |
| 1953 | 24 |
| 1954 | 35 |
| 1955 | 31 |
| 1956 | 37 |
| 1957 | 20 |
| 1958 | 49 |
| 1959 | 26 |
| 1960 | 49 |
| 1961 | 47 |
| 1962 | 23 |
| 1963 | 9 |
| 1964 | 63 |
| 1966 | 12 |
| 1967 | 19 |
| 1968 | 32 |
| 1969 | 5 |
| 1970 | 25 |
| 1971 | 39 |
| 1972 | 6 |
| 1973 | 52 |
| 1974 | 12 |
| 1975 | 21 |
| 1976 | 26 |
| 1977 | 28 |
| 1979 | 22 |
| 1982 | 6 |
| 1985 | 10 |