50% (1975)

65% (1978)

63% (1979)

64% (1984)

52% (1977)

52% (1987)

57% (1987)

43% (1986)

66% (1968)

0% (1980)

60% (1984)

49% (1989)

52% (1982)

50% (1976)

0% (1989)

70% (1982)

0% (1996)

0% (1986)

0% (2006)

0% (1988)