43% (1994)

52% (1993)

28% (1999)

58% (1992)

57% (1991)

66% (2001)

68% (2000)

69% (1989)

40% (1991)

44% (1994)

47% (1999)

65% (2001)

66% (1990)

55% (1997)

56% (1991)

48% (1995)

50% (1989)

29% (1998)

35% (1997)

52% (1997)