63% (1985)

54% (1979)

60% (1982)

64% (1981)

72% (1982)

43% (1978)

50% (1971)

42% (1967)

59% (1984)

55% (1984)

70% (1984)

54% (1982)

25% (1968)

70% (1976)

64% (1981)

62% (1982)

56% (1981)

50% (1971)

50% (1968)

0% (1967)