Bi-annual	US dollars
1987-06-30	100
1987-12-31	102
1988-06-30	99
1988-12-31	150
1989-06-30	50
1989-12-31	19
1990-06-30	19
1990-12-31	0
1991-06-30	6
1991-12-31	7
1992-06-30	10
1992-12-31	21
1993-06-30	33
1993-12-31	71
1994-06-30	167
1994-12-31	139
1995-06-30	59
1995-12-31	95
1996-06-30	62
1996-12-31	55
1997-06-30	52
1997-12-31	69
1998-06-30	35
1998-12-31	47
1999-06-30	55