59% (2014)

52% (2010)

71% (2008)

72% (2013)

15% (2006)

53% (2014)

45% (2003)

56% (1980)

54% (2011)

57% (2008)

58% (2007)

50% (2012)

66% (2002)

57% (1997)

33% (2010)

53% (2004)

47% (2012)

79% (2008)

48% (2000)

35% (2005)