56% (2009)

64% (2006)

63% (1999)

71% (2005)

51% (2011)

59% (2007)

55% (2004)

50% (2006)

67% (2007)

64% (2011)

53% (2000)

61% (2010)

68% (2011)

50% (2009)

61% (2000)

69% (2006)

80% (2002)

44% (2001)

58% (2009)

60% (2011)