Bi-annual	US dollars
1987-06-30	5
1987-12-31	8
1988-06-30	9
1988-12-31	9
1989-06-30	8
1989-12-31	27
1990-06-30	26
1990-12-31	44
1991-06-30	37
1991-12-31	47
1992-06-30	107
1992-12-31	91
1993-06-30	42
1993-12-31	50
1994-06-30	43
1994-12-31	55
1995-06-30	52
1995-12-31	74
1996-06-30	56
1996-12-31	63
1997-06-30	50
1997-12-31	89
1998-06-30	140
1998-12-31	121
1999-06-30	0