69% (1992)

60% (1984)

62% (1994)

50% (1982)

65% (2011)

65% (1971)

0% (1979)

62% (2003)

0% (1988)

0% (1980)

47% (1970)

0% (1992)

60% (2003)

62% (1992)

0% (1993)

50% (1985)

50% (2004)

73% (2004)

54% (2007)

70% (1983)