56% (2011)

58% (2007)

55% (2012)

63% (2010)

51% (2011)

47% (2002)

52% (2008)

59% (2008)

46% (2008)

53% (2005)

57% (2008)

37% (2001)

52% (2000)

56% (2001)

51% (2003)

57% (2012)

59% (2002)

52% (2001)

55% (2013)

50% (2002)