59% (2014)

57% (1997)

72% (2013)

71% (2008)

52% (2010)

54% (2011)

53% (2014)

58% (2007)

45% (2003)

57% (2008)

15% (2006)

56% (1980)

47% (2012)

66% (2002)

53% (2004)

33% (2010)

79% (2008)

35% (2005)

85% (2004)

0% (2001)