74% (1998)

80% (1994)

72% (2006)

59% (1999)

60% (1987)

77% (1983)

78% (1987)

66% (2000)

48% (2006)

68% (1982)

68% (1981)

40% (2014)

60% (1994)

66% (2003)

60% (1954)

84% (1984)

46% (2000)

67% (1992)

76% (1980)

68% (1997)