64% (1934)

56% (1976)

64% (1973)

76% (1969)

61% (1974)

66% (1968)

64% (1973)

67% (1977)

65% (1975)

60% (1968)

45% (1976)

57% (1969)

60% (1972)

56% (1974)

0% (1973)

40% (1976)

0% (1934)