58% (1986)

63% (1971)

20% (1997)

60% (1980)

60% (1994)

47% (1998)

0% (1958)

70% (1979)

25% (1985)

35% (1996)

50% (1969)

0% (1983)

40% (1950)

60% (1996)

0% (1997)

0% (2005)

0% (1980)

70% (1979)

52% (1989)

70% (2000)