60% (1975)

61% (1986)

59% (1988)

0% (1970)

62% (1976)

63% (1983)

50% (1993)

42% (1974)

52% (1978)

61% (1973)

80% (1975)

64% (1976)

57% (1972)

49% (1976)

58% (1970)

55% (1975)

60% (1979)

50% (1968)

60% (1985)

40% (1977)