54% (1999)

74% (1969)

63% (1973)

71% (1970)

48% (1973)

47% (1976)

62% (1975)

61% (1973)

61% (1975)

34% (1975)

46% (1973)

66% (1976)

65% (1974)

57% (1969)

65% (1971)

63% (1971)

63% (1973)

54% (1974)

52% (1972)

41% (1967)