68% (1975)

59% (1965)

40% (1977)

55% (1974)

50% (1978)

45% (1982)

62% (1964)

61% (1979)

42% (1974)

40% (1967)

40% (1976)

65% (1960)

87% (1959)

53% (1980)

71% (1977)

64% (1964)

60% (1965)

30% (1973)

65% (1963)

64% (1977)