63% (1978)

56% (1989)

56% (1977)

67% (1971)

64% (1978)

0% (1992)

0% (1986)

0% (1980)

47% (1978)

48% (1992)

0% (1989)

0% (1993)

0% (1986)

60% (1980)

0% (1979)

0% (1980)