Bi-annual	US dollars
1987-06-30	77
1987-12-31	119
1988-06-30	133
1988-12-31	145
1989-06-30	116
1989-12-31	110
1990-06-30	70
1990-12-31	58
1991-06-30	45
1991-12-31	65
1992-06-30	91
1992-12-31	88
1993-06-30	89
1993-12-31	90
1994-06-30	90
1994-12-31	59
1995-06-30	59
1995-12-31	36
1996-06-30	39
1996-12-31	39
1997-06-30	47
1997-12-31	44
1998-06-30	50
1998-12-31	58
1999-06-30	44