74% (2011)

50% (1979)

78% (2013)

79% (2002)

70% (2008)

76% (2011)

76% (2002)

74% (1998)

75% (2010)

20% (2002)

73% (1993)

79% (2007)

0% (2005)

43% (2002)

75% (2008)

74% (1995)

47% (1963)

77% (2006)

78% (2009)

74% (2000)