Bi-annual	US dollars
1987-06-30	16
1987-12-31	36
1988-06-30	19
1988-12-31	9
1989-06-30	153
1989-12-31	13
1990-06-30	19
1990-12-31	6
1991-06-30	6
1991-12-31	13
1992-06-30	10
1992-12-31	6
1993-06-30	42
1993-12-31	41
1994-06-30	49
1994-12-31	119
1995-06-30	99
1995-12-31	60
1996-06-30	165
1996-12-31	154
1997-06-30	163
1997-12-31	158
1998-06-30	155
1998-12-31	32
1999-06-30	25