47% (1975)

57% (1985)

65% (1999)

67% (1975)

46% (1974)

60% (1973)

60% (1988)

57% (1970)

62% (1976)

57% (1972)

32% (1999)

53% (1975)

55% (1975)

54% (1978)

49% (1976)

50% (1993)

0% (1970)

67% (1976)

60% (1979)

42% (1973)