61% (1999)

61% (1988)

72% (1992)

61% (1997)

69% (1992)

72% (1995)

70% (1995)

59% (1990)

69% (1989)

61% (1989)

68% (2000)

72% (1998)

63% (1990)

48% (1995)

52% (1995)

54% (1995)

58% (1985)

60% (1988)

63% (1998)

64% (2000)