52% (1999)

38% (1985)

66% (1979)

47% (1999)

68% (1996)

30% (1997)

40% (2002)

30% (1998)

24% (1997)

10% (1996)

55% (1986)

39% (1995)

18% (1996)

30% (1999)

55% (1996)

30% (1997)

58% (1997)

20% (1996)

52% (1997)

46% (1985)