45% (2008)

30% (1981)

45% (1984)

65% (1995)

0% (1989)

0% (1992)

0% (1975)

55% (1980)

35% (2006)

46% (1980)

20% (1983)

100% (1987)

10% (1977)

44% (1995)

25% (1999)

10% (1989)

46% (1999)

5% (1975)

80% (1988)

50% (1999)