Bi-annual	US dollars
1987-06-30	21
1987-12-31	85
1988-06-30	48
1988-12-31	141
1989-06-30	57
1989-12-31	42
1990-06-30	42
1990-12-31	35
1991-06-30	75
1991-12-31	82
1992-06-30	70
1992-12-31	65
1993-06-30	57
1993-12-31	40
1994-06-30	71
1994-12-31	48
1995-06-30	67
1995-12-31	50
1996-06-30	42
1996-12-31	41
1997-06-30	43
1997-12-31	54
1998-06-30	73
1998-12-31	67
1999-06-30	99