71% (1995)

70% (2000)

72% (1994)

66% (1998)

77% (1994)

67% (1998)

62% (1995)

53% (1998)

64% (1994)

67% (1994)

65% (1995)

70% (1999)

70% (1999)

63% (1997)

50% (1989)

64% (1998)

61% (1999)

72% (1998)

72% (1997)

70% (1996)