75% (2004)

80% (1993)

74% (2008)

76% (2006)

74% (2009)

71% (2008)

71% (1994)

60% (2010)

85% (1982)

76% (2002)

72% (1994)

57% (2001)

42% (2009)

76% (2009)

71% (1998)

50% (2003)

62% (2008)

61% (2004)

69% (1997)

69% (1991)