Bi-annual	US dollars
1987-06-30	119
1987-12-31	100
1988-06-30	77
1988-12-31	78
1989-06-30	88
1989-12-31	76
1990-06-30	73
1990-12-31	46
1991-06-30	45
1991-12-31	28
1992-06-30	23
1992-12-31	27
1993-06-30	20
1993-12-31	24
1994-06-30	17
1994-12-31	8
1995-06-30	10
1995-12-31	9
1996-06-30	9
1996-12-31	14
1997-06-30	22
1997-12-31	53
1998-06-30	48
1998-12-31	45
1999-06-30	38