40% (1973)

52% (1995)

64% (1973)

64% (1992)

68% (1988)

38% (1972)

50% (2003)

52% (1986)

48% (1974)

63% (1968)

50% (1971)

55% (1981)

69% (1973)

47% (1974)

63% (1966)

50% (1982)

66% (1980)

50% (1970)

70% (1967)

60% (1982)