41% (1997)

61% (1974)

55% (1973)

30% (1990)

40% (1980)

55% (1977)

63% (1974)

69% (1976)

50% (1972)

53% (1982)

10% (1973)

53% (1969)

55% (1977)

67% (1970)

42% (1978)

45% (1970)

42% (1973)

50% (1973)

52% (1970)

62% (1976)