0% (1978)

60% (1980)

40% (1981)

52% (1981)

49% (1980)

46% (1982)

0% (1983)

60% (1970)

60% (1986)

47% (1984)

30% (1987)

54% (1974)

30% (1984)

90% (1967)

0% (1977)

48% (1987)

60% (1982)

52% (1978)

50% (1989)

57% (1984)