80% (1994)

77% (1991)

58% (1992)

57% (1992)

74% (1991)

54% (1978)

70% (1992)

72% (1992)

67% (1992)

47% (1991)

62% (1990)

61% (1990)

57% (1991)

49% (1993)

59% (1993)

60% (1993)

58% (1993)

69% (1993)

59% (1992)

45% (1990)