80% (1994)

72% (2006)

74% (1998)

66% (2000)

78% (1987)

59% (1999)

60% (1987)

77% (1983)

68% (1982)

84% (1984)

67% (1992)

68% (1997)

48% (2006)

0% (2013)

61% (1995)

60% (1994)

67% (1964)

80% (1984)

68% (1981)

76% (1980)