62% (1994)

48% (1993)

53% (1998)

35% (1990)

48% (1989)

50% (1995)

62% (1992)

42% (1992)

33% (1997)

60% (1994)

45% (1994)

38% (1993)

50% (1989)

33% (1998)

38% (2000)

41% (1992)

48% (1992)

30% (1998)

46% (1991)

44% (1995)