73% (2015)

68% (2015)

68% (2004)

62% (2000)

71% (2014)

63% (2000)

58% (2011)

69% (1998)

60% (2008)

67% (2012)

56% (2013)

57% (2003)

72% (2014)

63% (2001)

74% (2003)

58% (2009)

53% (2012)

67% (2001)

50% (1994)

52% (2007)