61% (1995)

61% (2013)

74% (2009)

84% (2001)

82% (2003)

82% (1996)

66% (2006)

61% (2002)

80% (1977)

60% (1998)

75% (1972)

80% (2001)

100% (1970)

74% (2001)

81% (1999)

74% (2010)

83% (1999)

73% (2000)

63% (1995)

82% (2007)