70% (1980)

69% (1981)

74% (1981)

70% (1967)

53% (1980)

65% (1964)

67% (1970)

62% (1982)

53% (1982)

63% (1968)

63% (1981)

70% (1965)

73% (1971)

60% (1968)

71% (1967)

57% (1969)

62% (1976)

66% (1973)

63% (1965)

64% (1980)