Bi-annual	US dollars
1987-06-30	73
1987-12-31	138
1988-06-30	111
1988-12-31	110
1989-06-30	115
1989-12-31	87
1990-06-30	37
1990-12-31	46
1991-06-30	26
1991-12-31	21
1992-06-30	32
1992-12-31	20
1993-06-30	38
1993-12-31	12
1994-06-30	14
1994-12-31	11
1995-06-30	10
1995-12-31	0
1996-06-30	19
1996-12-31	5
1997-06-30	75
1997-12-31	295
1998-06-30	277
1998-12-31	100
1999-06-30	82