40% (1992)

60% (1987)

0% (1977)

10% (2003)

35% (2000)

0% (2000)

80% (2000)

0% (1970)

0% (1993)

65% (1996)

90% (1995)

62% (2002)

0% (1989)

15% (2001)

58% (1986)

0% (1987)

0% (1992)

30% (1985)

51% (2001)

60% (1999)