42% (1981)

69% (2014)

60% (1977)

61% (1979)

56% (1980)

59% (1978)

30% (1983)

68% (1979)

49% (1981)

47% (1973)

71% (1987)

42% (1975)

47% (1980)

45% (1987)

52% (1981)

27% (2000)

60% (1976)

50% (1975)

60% (1963)

59% (1979)