Bi-annual	US dollars
1987-06-30	23
1987-12-31	25
1988-06-30	19
1988-12-31	13
1989-06-30	48
1989-12-31	47
1990-06-30	5
1990-12-31	14
1991-06-30	11
1991-12-31	9
1992-06-30	42
1992-12-31	33
1993-06-30	51
1993-12-31	96
1994-06-30	88
1994-12-31	92
1995-06-30	194
1995-12-31	141
1996-06-30	134
1996-12-31	151
1997-06-30	143
1997-12-31	10
1998-06-30	12
1998-12-31	90
1999-06-30	32