58% (1979)

40% (1991)

61% (1979)

0% (1976)

62% (1976)

68% (1980)

68% (1970)

35% (1976)

0% (1978)

48% (1987)

60% (1988)

65% (1981)

43% (1981)

66% (1970)

30% (1967)

60% (1980)

39% (1968)

70% (1962)

48% (1983)

50% (1987)