61% (1978)

59% (1979)

72% (1988)

0% (1988)

53% (1984)

43% (1999)

71% (1980)

58% (1972)

49% (1991)

0% (1986)

41% (2000)

30% (1997)

0% (1979)

33% (1978)

0% (1992)

50% (1987)

66% (1989)

55% (2001)

50% (1993)

65% (1961)