74% (2012)

71% (2003)

84% (1987)

74% (2025)

84% (2013)

52% (1971)

60% (2005)

72% (1994)

55% (1988)

82% (2005)

80% (2008)

74% (1996)

78% (1992)

87% (1999)

79% (2004)

82% (2014)

88% (1983)

90% (2008)

60% (1979)

74% (2004)