56% (1961)

65% (1982)

53% (1971)

53% (1969)

56% (1965)

50% (1969)

73% (1968)

62% (1968)

62% (1959)

44% (1970)

58% (1965)

0% (1966)

23% (1967)

40% (1977)

33% (1985)

50% (1957)

56% (1967)

60% (1976)

58% (1960)

45% (1968)