62% (2014)

61% (2014)

72% (2009)

73% (2008)

68% (2017)

71% (2007)

66% (2005)

69% (2003)

73% (1979)

71% (2009)

51% (2017)

55% (2015)

58% (2010)

50% (2013)

40% (1999)

0% (1988)