0% (1977)

0% (1979)

0% (1978)

0% (1983)

30% (1986)

62% (1994)

47% (1975)

42% (1984)

64% (1976)

80% (1996)

66% (1983)

65% (1994)

64% (1993)

42% (1979)

0% (1979)

10% (1976)

60% (1985)

45% (1979)

60% (1986)

50% (1980)