79% (1994)

74% (1991)

77% (1991)

59% (1990)

58% (1992)

59% (1993)

47% (1991)

57% (1992)

54% (1978)

70% (1992)

49% (1993)

72% (1993)

57% (1991)

69% (1990)

62% (1990)

58% (1990)

69% (1991)

72% (1992)

65% (1980)

61% (1990)