56% (1994)

56% (1978)

53% (1973)

49% (1977)

20% (1973)

55% (1978)

90% (1978)

64% (1978)

68% (1980)

20% (1993)

0% (1971)

55% (1993)

48% (1971)

60% (1986)

0% (1972)