70% (1980)

63% (1982)

70% (1967)

74% (1981)

65% (1964)

64% (1965)

70% (1965)

67% (1970)

62% (1968)

63% (1965)

62% (1981)

53% (1980)

62% (1976)

61% (1966)

73% (1971)

67% (1964)

56% (1972)

65% (1971)

71% (1967)

69% (1981)