67% (1973)

64% (1974)

0% (1965)

51% (1973)

69% (1976)

71% (1973)

0% (1964)

60% (1972)

50% (1953)

65% (1969)

60% (1974)

65% (1972)

65% (1977)

70% (1973)

0% (1950)

60% (1970)

70% (1961)

67% (1975)

0% (1963)

64% (1975)