70% (1980)

63% (1981)

70% (1965)

70% (1967)

63% (1982)

74% (1981)

67% (1970)

62% (1976)

54% (1982)

73% (1971)

62% (1968)

62% (1975)

65% (1964)

52% (1980)

57% (1969)

63% (1965)

66% (1973)

53% (1967)

67% (1964)

61% (1966)