80% (1994)

77% (1991)

56% (1978)

66% (1994)

74% (1991)

57% (1992)

47% (1991)

69% (1993)

72% (1992)

57% (1991)

58% (1993)

72% (1993)

58% (1990)

60% (1990)

70% (1992)

58% (1993)

58% (1990)

44% (1992)

67% (1992)

63% (1990)