50% (2013)

60% (2009)

69% (1993)

54% (2008)

46% (2008)

47% (2007)

68% (2009)

72% (2012)

52% (2008)

65% (1993)

41% (2011)

57% (2007)

70% (2007)

68% (2007)

52% (2009)

62% (2007)

45% (2007)

46% (2008)

61% (2003)

64% (2006)