69% (1980)

70% (1967)

63% (1981)

70% (1965)

52% (1980)

63% (1982)

71% (1967)

67% (1970)

74% (1981)

62% (1968)

51% (1980)

73% (1971)

64% (1964)

65% (1971)

57% (1969)

53% (1967)

60% (1966)

61% (1976)

63% (1965)

66% (1973)