Bi-annual	US dollars
1987-06-30	55
1987-12-31	51
1988-06-30	48
1988-12-31	42
1989-06-30	40
1989-12-31	23
1990-06-30	21
1990-12-31	44
1991-06-30	37
1991-12-31	45
1992-06-30	38
1992-12-31	29
1993-06-30	0
1993-12-31	0
1994-06-30	0
1994-12-31	0
1995-06-30	0
1995-12-31	0
1996-06-30	0
1996-12-31	0
1997-06-30	0
1997-12-31	0
1998-06-30	0
1998-12-31	0
1999-06-30	0