0% (1982)

0% (1991)

30% (1990)

68% (1992)

0% (1977)

0% (1981)

37% (1975)

50% (1988)

0% (1972)

40% (1996)

0% (1987)

60% (1985)

30% (1995)

59% (1977)

35% (1989)

53% (1984)

52% (1999)

50% (1980)

0% (1989)

60% (1986)