Bi-annual	US dollars
1987-06-30	45
1987-12-31	51
1988-06-30	101
1988-12-31	195
1989-06-30	64
1989-12-31	32
1990-06-30	31
1990-12-31	21
1991-06-30	28
1991-12-31	67
1992-06-30	167
1992-12-31	156
1993-06-30	135
1993-12-31	146
1994-06-30	154
1994-12-31	27
1995-06-30	2
1995-12-31	2
1996-06-30	37
1996-12-31	2
1997-06-30	2
1997-12-31	41
1998-06-30	0
1998-12-31	2
1999-06-30	5