Bi-annual	US dollars
1987-06-30	15
1987-12-31	11
1988-06-30	7
1988-12-31	5
1989-06-30	6
1989-12-31	6
1990-06-30	5
1990-12-31	10
1991-06-30	5
1991-12-31	9
1992-06-30	27
1992-12-31	21
1993-06-30	84
1993-12-31	64
1994-06-30	148
1994-12-31	180
1995-06-30	199
1995-12-31	206
1996-06-30	216
1996-12-31	219
1997-06-30	141
1997-12-31	114
1998-06-30	33
1998-12-31	30
1999-06-30	36