| Year | Count |
|---|---|
| 1920 | 5 |
| 1922 | 5 |
| 1927 | 7 |
| 1928 | 5 |
| 1929 | 6 |
| 1930 | 6 |
| 1931 | 5 |
| 1935 | 7 |
| 1937 | 7 |
| 1940 | 7 |
| 1941 | 5 |
| 1942 | 9 |
| 1943 | 5 |
| 1944 | 6 |
| 1945 | 5 |
| 1946 | 8 |
| 1947 | 7 |
| 1948 | 5 |
| 1949 | 5 |
| 1949 | 6 |
| 1950 | 10 |
| 1950 | 5 |
| 1951 | 12 |
| 1952 | 6 |
| 1953 | 6 |
| 1953 | 6 |
| 1954 | 5 |
| 1954 | 6 |
| 1955 | 10 |
| 1955 | 7 |
| 1956 | 5 |
| 1959 | 5 |
| 1960 | 6 |
| 1962 | 10 |
| 1963 | 6 |
| 1964 | 8 |
| 1965 | 5 |
| 1966 | 5 |
| 1990 | 5 |
| 2004 | 5 |