Bi-annual	US dollars
1987-06-30	113
1987-12-31	119
1988-06-30	97
1988-12-31	20
1989-06-30	19
1989-12-31	8
1990-06-30	99
1990-12-31	98
1991-06-30	86
1991-12-31	103
1992-06-30	99
1992-12-31	86
1993-06-30	90
1993-12-31	84
1994-06-30	100
1994-12-31	6
1995-06-30	19
1995-12-31	59
1996-06-30	51
1996-12-31	10
1997-06-30	10
1997-12-31	25
1998-06-30	20
1998-12-31	45
1999-06-30	66