70% (1979)

70% (1962)

69% (1963)

45% (1990)

69% (1965)

66% (1964)

50% (1988)

61% (1965)

66% (1972)

54% (1985)

64% (1968)

53% (1976)

67% (1969)

62% (1964)

68% (1971)

36% (1985)

45% (1995)

60% (1971)

61% (1966)

56% (1966)