Bi-annual	US dollars
1987-06-30	100
1987-12-31	98
1988-06-30	41
1988-12-31	49
1989-06-30	34
1989-12-31	37
1990-06-30	33
1990-12-31	37
1991-06-30	42
1991-12-31	32
1992-06-30	63
1992-12-31	53
1993-06-30	113
1993-12-31	106
1994-06-30	97
1994-12-31	122
1995-06-30	116
1995-12-31	88
1996-06-30	101
1996-12-31	104
1997-06-30	93
1997-12-31	87
1998-06-30	50
1998-12-31	52
1999-06-30	77