76% (2011)

74% (2011)

70% (2008)

75% (2008)

75% (2010)

79% (2014)

0% (1990)

80% (2009)

60% (1997)

83% (2003)

47% (1979)

55% (1997)

80% (1973)

77% (2009)

35% (2001)

40% (2001)

81% (2006)

75% (1988)

50% (1996)

75% (2008)