Bi-annual	US dollars
1987-06-30	63
1987-12-31	53
1988-06-30	78
1988-12-31	29
1989-06-30	99
1989-12-31	56
1990-06-30	23
1990-12-31	33
1991-06-30	79
1991-12-31	49
1992-06-30	6
1992-12-31	26
1993-06-30	527
1993-12-31	53
1994-06-30	37
1994-12-31	44
1995-06-30	45
1995-12-31	45
1996-06-30	31
1996-12-31	68
1997-06-30	67
1997-12-31	109
1998-06-30	230
1998-12-31	376
1999-06-30	397