75% (2004)

74% (2008)

80% (1993)

76% (2006)

74% (2009)

72% (2008)

71% (1994)

76% (2009)

72% (1994)

76% (1999)

61% (2004)

70% (1997)

63% (2008)

60% (2010)

69% (2002)

85% (1982)

60% (2000)

61% (2000)

66% (1992)

0% (1989)