Bi-annual	US dollars
1987-06-30	11
1987-12-31	28
1988-06-30	9
1988-12-31	31
1989-06-30	11
1989-12-31	29
1990-06-30	19
1990-12-31	17
1991-06-30	0
1991-12-31	2
1992-06-30	0
1992-12-31	0
1993-06-30	2
1993-12-31	0
1994-06-30	37
1994-12-31	55
1995-06-30	100
1995-12-31	152
1996-06-30	182
1996-12-31	187
1997-06-30	216
1997-12-31	163
1998-06-30	48
1998-12-31	111
1999-06-30	98