59% (1985)

65% (1980)

62% (1982)

66% (1978)

56% (1975)

56% (1989)

70% (1984)

0% (1972)

59% (1989)

52% (1984)

40% (1972)

0% (1973)

50% (1974)

50% (1985)

20% (1985)

70% (1977)

53% (1983)

10% (1982)

30% (1978)

53% (1982)