57% (1992)

77% (1991)

56% (1978)

74% (1991)

79% (1994)

62% (1993)

69% (1991)

63% (1990)

67% (1992)

66% (1994)

69% (1993)

58% (1993)

58% (1990)

60% (1990)

44% (1992)

43% (1994)

57% (1991)

72% (1992)

47% (1991)

69% (1994)