90% (1999)

0% (1997)

78% (1987)

50% (1967)

30% (1994)

0% (1987)

20% (1999)

0% (2001)

0% (1977)

72% (2005)

80% (1997)

52% (2008)

60% (1979)

0% (1987)

0% (1996)

0% (1989)

0% (1983)

0% (1985)

60% (1975)

0% (1974)