77% (1986)

80% (1994)

81% (1994)

76% (1996)

63% (1985)

100% (1993)

74% (1999)

69% (2008)

60% (2009)

67% (2004)

60% (2003)

66% (2001)

71% (1992)

76% (2001)

68% (1993)

65% (1997)

54% (1982)

0% (1980)

62% (1980)

63% (2000)