69% (2007)

58% (2008)

63% (1999)

55% (2005)

73% (2009)

59% (2009)

65% (2002)

65% (2005)

49% (2000)

75% (2002)

72% (2004)

63% (2003)

62% (2009)

63% (2004)

60% (2002)

70% (2006)

50% (1999)

60% (1999)

61% (2011)

69% (2010)