Bi-annual	US dollars
1987-06-30	34
1987-12-31	51
1988-06-30	14
1988-12-31	33
1989-06-30	12
1989-12-31	13
1990-06-30	28
1990-12-31	19
1991-06-30	10
1991-12-31	11
1992-06-30	8
1992-12-31	14
1993-06-30	8
1993-12-31	13
1994-06-30	11
1994-12-31	14
1995-06-30	8
1995-12-31	9
1996-06-30	17
1996-12-31	38
1997-06-30	0
1997-12-31	0
1998-06-30	0
1998-12-31	0
1999-06-30	0