59% (1972)

70% (1967)

52% (1969)

58% (1970)

60% (1972)

77% (1963)

57% (1974)

68% (1976)

64% (1959)

66% (1972)

64% (1976)

69% (1961)

50% (1965)

80% (1954)

0% (1958)

47% (1921)

53% (1956)

0% (1961)

10% (1980)

57% (1979)