58% (1996)

47% (1997)

72% (1983)

53% (1999)

65% (1992)

60% (1997)

10% (1994)

48% (1997)

80% (1980)

46% (1990)

100% (2000)

56% (1989)

64% (1995)

42% (1994)

0% (1985)

80% (1984)

30% (2000)

0% (1990)

70% (1973)

20% (1988)