80% (1994)

81% (1994)

77% (1986)

74% (1999)

75% (1996)

63% (1985)

76% (2001)

69% (2008)

64% (1999)

71% (1992)

56% (2004)

67% (2004)

60% (1996)

65% (1997)

62% (1980)

54% (1982)

71% (2000)

48% (2009)

41% (1994)

63% (2000)