Bi-annual	US dollars
1987-06-30	19
1987-12-31	26
1988-06-30	17
1988-12-31	33
1989-06-30	51
1989-12-31	44
1990-06-30	28
1990-12-31	21
1991-06-30	24
1991-12-31	17
1992-06-30	17
1992-12-31	15
1993-06-30	12
1993-12-31	18
1994-06-30	8
1994-12-31	0
1995-06-30	5
1995-12-31	5
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