74% (1998)

80% (1994)

72% (2006)

59% (1999)

66% (2000)

78% (1987)

84% (1984)

70% (1982)

60% (1994)

46% (2000)

40% (2005)

77% (1983)

67% (2003)

67% (1992)

48% (2006)

63% (1980)

80% (1984)

0% (1997)

60% (1987)

69% (1964)