70% (1956)

65% (1989)

0% (1978)

58% (1984)

50% (1973)

63% (2000)

52% (1997)

69% (1977)

58% (1979)

50% (1997)

56% (2003)

50% (1959)

52% (1992)

70% (1995)

44% (1994)

50% (1999)

15% (1997)

35% (1987)

59% (2003)

25% (1985)