Bi-annual	US dollars
1987-06-30	76
1987-12-31	74
1988-06-30	89
1988-12-31	71
1989-06-30	73
1989-12-31	81
1990-06-30	65
1990-12-31	77
1991-06-30	62
1991-12-31	43
1992-06-30	42
1992-12-31	44
1993-06-30	35
1993-12-31	41
1994-06-30	35
1994-12-31	33
1995-06-30	46
1995-12-31	37
1996-06-30	37
1996-12-31	39
1997-06-30	40
1997-12-31	43
1998-06-30	43
1998-12-31	42
1999-06-30	44