56% (1978)

56% (1994)

64% (1978)

49% (1977)

53% (1973)

20% (1993)

68% (1980)

20% (1973)

55% (1993)

55% (1978)

48% (1971)

90% (1978)

0% (1972)

60% (1986)

0% (1971)