67% (1975)

64% (1999)

46% (1974)

57% (1972)

47% (1975)

57% (1985)

67% (1976)

56% (1997)

30% (1975)

50% (1968)

62% (1976)

32% (1999)

60% (1973)

54% (1978)

60% (1979)

49% (1976)

80% (1975)

0% (1970)

55% (1975)

50% (1993)