73% (2003)

62% (1996)

68% (2003)

44% (2000)

62% (2000)

54% (1998)

68% (1996)

62% (1998)

60% (1997)

52% (1994)

56% (1997)

37% (2002)

30% (1997)

65% (2003)

47% (2002)

58% (1997)

36% (1995)

53% (2001)

38% (1994)

60% (2004)