65% (1982)

40% (1977)

56% (1961)

56% (1965)

53% (1969)

64% (1959)

50% (1964)

53% (1958)

57% (1974)

45% (1970)

58% (1960)

56% (1965)

53% (1971)

56% (1967)

35% (1975)

62% (1968)

50% (1969)

44% (1979)

70% (1960)

47% (1974)