70% (1980)

67% (1970)

70% (1967)

53% (1982)

74% (1981)

62% (1982)

57% (1969)

62% (1981)

70% (1965)

63% (1968)

53% (1967)

59% (1978)

44% (1981)

71% (1967)

56% (1972)

73% (1971)

62% (1963)

59% (1980)

65% (1964)

64% (1980)