20% (2005)

25% (1992)

60% (1994)

90% (1989)

0% (1989)

20% (1988)

30% (2000)

40% (2002)

20% (2000)

50% (2005)

20% (1991)

20% (2000)

0% (1969)

40% (2002)

10% (1999)

20% (1972)

0% (1992)

60% (1993)

20% (1988)

20% (1963)