79% (1994)

64% (1985)

62% (1990)

75% (1996)

82% (1994)

69% (2008)

76% (2001)

67% (2004)

73% (1999)

63% (2000)

60% (2009)

77% (1986)

41% (1994)

65% (1997)

71% (2000)

55% (2002)

62% (1986)

50% (1982)

66% (2009)

62% (1986)