Bi-annual	US dollars
1987-06-30	108
1987-12-31	109
1988-06-30	77
1988-12-31	105
1989-06-30	64
1989-12-31	39
1990-06-30	30
1990-12-31	31
1991-06-30	24
1991-12-31	52
1992-06-30	67
1992-12-31	68
1993-06-30	81
1993-12-31	58
1994-06-30	91
1994-12-31	84
1995-06-30	35
1995-12-31	73
1996-06-30	84
1996-12-31	82
1997-06-30	12
1997-12-31	25
1998-06-30	60
1998-12-31	48
1999-06-30	52