52% (1999)

66% (1979)

38% (1985)

40% (2002)

30% (1997)

68% (1996)

55% (1986)

39% (1995)

24% (1997)

47% (1999)

18% (1996)

30% (1997)

30% (1998)

10% (1996)

46% (1985)

20% (1996)

10% (1997)

30% (1999)

20% (1997)

58% (1997)