60% (1989)

50% (1980)

20% (2001)

56% (1971)

25% (1984)

50% (2002)

54% (1988)

0% (1972)

64% (2002)

50% (1994)

50% (2006)

45% (1998)

0% (1972)

0% (1980)

35% (1999)

0% (1972)

20% (1996)

0% (1964)

0% (1972)

50% (1992)