70% (1998)

67% (1999)

65% (2001)

70% (2005)

65% (2003)

65% (2000)

67% (2002)

66% (2004)

64% (1998)

63% (1999)

75% (1986)

67% (2003)

61% (2000)

63% (2001)

78% (1999)

56% (2002)

80% (1998)

61% (1999)

60% (2000)

70% (1994)