63% (1979)

65% (1978)

52% (1977)

60% (1984)

50% (1976)

49% (1989)

50% (1975)

52% (1982)

66% (1968)

43% (1986)

0% (1980)

65% (1984)

57% (1987)

70% (1982)

52% (1987)

0% (2006)

0% (1989)

0% (1996)

0% (1980)

0% (1988)