37% (1998)

52% (1995)

56% (1998)

61% (1993)

38% (1997)

48% (1991)

45% (1995)

22% (1989)

33% (1998)

53% (1991)

44% (1997)

74% (1994)

57% (1994)

48% (1995)

43% (1991)

59% (1999)

48% (1998)

37% (2001)

55% (1994)

50% (1994)