0% (1980)

32% (1987)

47% (1990)

50% (1991)

55% (2002)

0% (1996)

45% (2000)

73% (2008)

61% (2000)

35% (2004)

0% (1988)

0% (1988)

0% (1979)

0% (2006)

45% (2001)

0% (2002)

53% (1982)

0% (2008)

0% (1971)

64% (2005)