64% (1987)

69% (1988)

72% (1973)

35% (2001)

0% (1962)

50% (1981)

56% (1969)

70% (1979)

72% (1978)

38% (1973)

71% (1973)

10% (1991)

0% (1971)

55% (1983)

71% (1982)

50% (1971)

65% (1977)

71% (1977)

69% (1985)

0% (1968)