50% (1998)

43% (1985)

44% (1986)

52% (1988)

37% (1988)

36% (1995)

30% (1998)

51% (1989)

30% (1989)

24% (1997)

30% (1995)

46% (1992)

57% (1990)

10% (1990)

40% (2000)

32% (2000)

52% (1992)

39% (1990)

30% (1996)

43% (1989)