Bi-annual	US dollars
1987-06-30	163
1987-12-31	132
1988-06-30	138
1988-12-31	165
1989-06-30	152
1989-12-31	118
1990-06-30	152
1990-12-31	156
1991-06-30	88
1991-12-31	67
1992-06-30	63
1992-12-31	29
1993-06-30	53
1993-12-31	24
1994-06-30	14
1994-12-31	28
1995-06-30	14
1995-12-31	17
1996-06-30	92
1996-12-31	45
1997-06-30	60
1997-12-31	61
1998-06-30	0
1998-12-31	0
1999-06-30	0