Bi-annual	US dollars
1987-06-30	32
1987-12-31	47
1988-06-30	68
1988-12-31	83
1989-06-30	57
1989-12-31	18
1990-06-30	26
1990-12-31	71
1991-06-30	18
1991-12-31	32
1992-06-30	25
1992-12-31	18
1993-06-30	68
1993-12-31	16
1994-06-30	22
1994-12-31	23
1995-06-30	29
1995-12-31	6
1996-06-30	0
1996-12-31	43
1997-06-30	57
1997-12-31	16
1998-06-30	55
1998-12-31	5
1999-06-30	3