73% (2003)

62% (1996)

43% (2000)

53% (1998)

61% (1998)

38% (2002)

52% (1994)

68% (2003)

55% (1997)

65% (2003)

50% (1999)

56% (1997)

47% (2002)

45% (1994)

42% (1997)

61% (2000)

58% (1997)

53% (2001)

60% (1997)

68% (1996)