56% (1989)

62% (1978)

30% (1978)

56% (1977)

0% (1980)

67% (1971)

0% (1986)

0% (1993)

64% (1978)

0% (1979)

60% (1980)

0% (1992)

0% (1986)

48% (1992)

0% (1989)

0% (1980)