56% (1961)

65% (1982)

48% (1974)

55% (1958)

53% (1969)

56% (1967)

54% (1965)

56% (1965)

53% (1971)

47% (1974)

0% (1966)

53% (1964)

50% (1969)

10% (1974)

40% (1977)

62% (1968)

33% (1985)

73% (1968)

60% (1976)

44% (1970)