Bi-annual	US dollars
1987-06-30	34
1987-12-31	60
1988-06-30	29
1988-12-31	36
1989-06-30	25
1989-12-31	39
1990-06-30	65
1990-12-31	96
1991-06-30	60
1991-12-31	90
1992-06-30	59
1992-12-31	52
1993-06-30	41
1993-12-31	75
1994-06-30	105
1994-12-31	77
1995-06-30	62
1995-12-31	60
1996-06-30	179
1996-12-31	74
1997-06-30	53
1997-12-31	41
1998-06-30	32
1998-12-31	22
1999-06-30	32