| Year | Count |
|---|---|
| 1923 | 6 |
| 1924 | 5 |
| 1925 | 9 |
| 1926 | 12 |
| 1927 | 10 |
| 1928 | 18 |
| 1929 | 16 |
| 1930 | 12 |
| 1933 | 10 |
| 1938 | 5 |
| 1939 | 9 |
| 1940 | 9 |
| 1950 | 14 |
| 1951 | 14 |
| 1952 | 12 |
| 1953 | 15 |
| 1954 | 16 |
| 1955 | 21 |
| 1956 | 15 |
| 1957 | 6 |
| 1958 | 19 |
| 1959 | 8 |
| 1960 | 9 |
| 1961 | 9 |
| 1966 | 12 |
| 1968 | 6 |
| 1969 | 14 |
| 1970 | 12 |
| 1971 | 13 |
| 1973 | 9 |
| 1974 | 11 |
| 1975 | 9 |
| 1976 | 5 |
| 1977 | 6 |
| 1978 | 9 |
| 1979 | 15 |
| 1982 | 6 |
| 1985 | 12 |
| 1986 | 10 |
| 1987 | 10 |
| 1993 | 5 |