80% (1994)

81% (1994)

76% (2001)

78% (1986)

75% (1996)

62% (1980)

69% (2008)

64% (1999)

63% (1985)

65% (1997)

71% (2000)

62% (1986)

74% (1999)

68% (2004)

63% (2000)

38% (2001)

42% (2009)

71% (1992)

66% (2006)

60% (2004)