67% (2006)

47% (2013)

69% (2003)

66% (2007)

61% (2008)

70% (2001)

74% (2004)

61% (2007)

56% (2006)

53% (2002)

63% (2007)

60% (2005)

50% (2000)

52% (2009)

53% (2005)

63% (2006)

43% (2002)

61% (2011)

58% (2005)

57% (1996)