75% (1999)

79% (1998)

73% (1985)

76% (1996)

82% (1998)

79% (1996)

68% (1994)

73% (1999)

73% (1994)

59% (1998)

72% (1998)

72% (1998)

76% (1997)

67% (1992)

64% (1995)

60% (1997)

70% (1990)

60% (1997)

61% (1997)

73% (1999)