37% (1995)

33% (1979)

47% (1981)

57% (1992)

62% (1977)

38% (1985)

52% (1986)

10% (1998)

69% (1989)

25% (1988)

60% (1983)

38% (1980)

53% (1992)

50% (1978)

47% (1982)