75% (2004)

73% (2008)

80% (1993)

75% (2006)

75% (1999)

73% (2009)

71% (2008)

71% (1994)

60% (2010)

68% (1991)

75% (2009)

86% (1982)

57% (2001)

57% (1998)

72% (1994)

70% (1980)

69% (1997)

0% (1991)

0% (1993)

77% (1963)