59% (2014)

54% (2011)

72% (2013)

52% (2010)

71% (2008)

15% (2004)

59% (2007)

56% (1980)

45% (2003)

79% (2008)

73% (2004)

35% (2005)

78% (2008)

52% (2014)

47% (2012)

57% (2008)

66% (2002)

33% (2010)

48% (2000)

50% (2012)