59% (2014)

15% (2006)

71% (2008)

52% (2010)

57% (1997)

72% (2013)

53% (2014)

66% (2002)

59% (2007)

56% (1980)

54% (2011)

57% (2008)

79% (2008)

48% (2000)

37% (1962)

33% (2010)

45% (2003)

35% (2005)

46% (2012)

73% (2013)