48% (1992)

40% (1992)

50% (1992)

46% (1993)

36% (1986)

35% (1986)

59% (1986)

49% (1990)

37% (1991)

37% (1990)

57% (1990)

36% (1995)

49% (1994)

22% (1997)

40% (1992)

30% (1995)

41% (1991)

39% (1988)

53% (1988)

45% (1985)