| Year | Count |
|---|---|
| 1928 | 26 |
| 1937 | 6 |
| 1939 | 6 |
| 1940 | 7 |
| 1942 | 11 |
| 1943 | 9 |
| 1944 | 9 |
| 1946 | 10 |
| 1947 | 6 |
| 1948 | 10 |
| 1949 | 5 |
| 1950 | 8 |
| 1951 | 9 |
| 1952 | 8 |
| 1953 | 11 |
| 1954 | 12 |
| 1955 | 8 |
| 1956 | 13 |
| 1957 | 5 |
| 1958 | 7 |
| 1959 | 9 |
| 1960 | 10 |
| 1961 | 7 |
| 1962 | 9 |
| 1964 | 6 |
| 1965 | 7 |
| 1966 | 5 |
| 1967 | 9 |
| 1975 | 5 |
| 1976 | 8 |
| 1981 | 5 |
| 1982 | 5 |
| 1987 | 5 |
| 2005 | 5 |