60% (1987)

20% (1994)

50% (1986)

55% (1986)

10% (1985)

50% (1989)

60% (1990)

54% (1988)

58% (1988)

32% (1991)

47% (1988)

43% (1983)

45% (1993)

60% (1986)

10% (1987)

0% (1987)

20% (1979)

50% (1985)

50% (1987)

33% (1986)