64% (1989)

42% (1987)

72% (1986)

45% (1987)

45% (1979)

50% (1986)

53% (1989)

51% (1982)

36% (1980)

40% (1993)

61% (1988)

74% (1986)

39% (1981)

59% (1986)

52% (1984)

62% (1986)

40% (1971)

63% (1973)

36% (1967)

84% (1984)