75% (2004)

73% (2008)

75% (2006)

79% (1993)

73% (2009)

71% (2008)

71% (1994)

75% (1999)

73% (1994)

60% (2010)

56% (2001)

48% (2009)

61% (2004)

85% (1982)

0% (1989)

63% (2008)

69% (2002)

50% (2003)

76% (2009)

70% (1997)