58% (1984)

62% (1974)

60% (1994)

70% (1983)

72% (1978)

54% (1993)

50% (1979)

49% (1973)

51% (1994)

58% (1979)

50% (1987)

65% (1988)

41% (1990)

20% (1976)

52% (1982)

0% (1979)

47% (1997)

65% (1987)

37% (1988)

58% (1978)