57% (1972)

62% (1976)

64% (1999)

47% (1975)

60% (1973)

57% (1985)

50% (1968)

49% (1976)

46% (1974)

55% (1975)

32% (1999)

42% (1973)

30% (1975)

57% (1972)

80% (1975)

67% (1976)

0% (1970)

57% (1970)

54% (1979)

60% (1979)