62% (1990)

80% (1994)

77% (1991)

74% (1991)

50% (1979)

57% (1992)

69% (1991)

57% (1991)

47% (1991)

58% (1993)

58% (1993)

54% (1978)

58% (1992)

49% (1993)

63% (1991)

67% (1992)

70% (1992)

59% (1990)

72% (1992)

65% (1980)