80% (1994)

74% (1991)

62% (1991)

57% (1992)

77% (1991)

47% (1991)

72% (1992)

67% (1992)

67% (1992)

58% (1993)

69% (1990)

58% (1990)

59% (1992)

48% (1993)

58% (1992)

62% (1993)

59% (1990)

57% (1991)

68% (1994)

61% (1990)