64% (1992)

70% (1986)

48% (2012)

0% (1990)

30% (1992)

50% (1984)

56% (1977)

50% (2009)

61% (1982)

66% (1989)

58% (2006)

53% (2010)

65% (1984)

64% (1987)

66% (1988)

40% (1977)

68% (1973)

38% (2001)

66% (1989)

0% (1965)