Bi-annual	US dollars
1987-06-30	0
1987-12-31	38
1988-06-30	24
1988-12-31	14
1989-06-30	9
1989-12-31	6
1990-06-30	12
1990-12-31	14
1991-06-30	16
1991-12-31	58
1992-06-30	55
1992-12-31	41
1993-06-30	168
1993-12-31	87
1994-06-30	231
1994-12-31	131
1995-06-30	157
1995-12-31	174
1996-06-30	320
1996-12-31	80
1997-06-30	123
1997-12-31	100
1998-06-30	273
1998-12-31	125
1999-06-30	156