69% (2000)

60% (2001)

80% (2009)

72% (2007)

76% (2003)

75% (2010)

67% (2004)

62% (1999)

71% (2003)

66% (2004)

63% (2009)

64% (2004)

69% (2000)

70% (2005)

47% (2002)

62% (2004)

70% (2001)

65% (2006)

55% (2007)

72% (2002)