73% (1985)

71% (1984)

57% (1991)

56% (1991)

66% (1992)

64% (1986)

27% (1995)

63% (1991)

56% (1988)

53% (1990)

53% (1985)

45% (1992)

60% (1985)

61% (1990)

61% (1993)

37% (1995)

58% (1990)

57% (1995)

62% (1992)

20% (1985)