58% (1999)

66% (2012)

75% (2006)

66% (2008)

71% (2009)

69% (2003)

69% (2004)

63% (2010)

70% (2007)

71% (2000)

64% (2006)

75% (2004)

69% (2007)

71% (2002)

57% (2009)

82% (2002)

52% (2001)

68% (2008)

67% (2007)

61% (2010)