48% (1974)

65% (1992)

52% (1995)

64% (1973)

68% (1988)

38% (1972)

47% (1974)

63% (1966)

70% (1967)

50% (2003)

66% (1980)

55% (1981)

70% (1966)

67% (1971)

30% (1992)

63% (1968)

60% (1975)

69% (1973)

52% (1986)

50% (1971)