80% (1994)

74% (1991)

57% (1992)

77% (1991)

62% (1990)

72% (1992)

67% (1992)

47% (1991)

59% (1990)

59% (1993)

58% (1990)

49% (1993)

54% (1978)

58% (1993)

61% (1990)

69% (1993)

70% (1992)

68% (1994)

45% (1990)

57% (1991)