44% (2001)

72% (2005)

66% (2006)

68% (1999)

58% (1995)

50% (1998)

52% (2002)

65% (1999)

61% (2001)

71% (2003)

61% (2000)

61% (2003)

76% (2002)

67% (2002)

68% (1997)

61% (2003)

68% (2003)

62% (2002)

65% (1999)

67% (2005)