90% (1957)

60% (1989)

0% (1989)

70% (1983)

47% (1996)

0% (1991)

30% (1998)

42% (1983)

40% (1988)

20% (1978)

20% (1984)

60% (1980)

30% (1979)

53% (1992)

47% (1998)

30% (2003)

60% (1998)

60% (1986)

44% (2002)

52% (1977)