Bi-annual	US dollars
1987-06-30	18
1987-12-31	32
1988-06-30	22
1988-12-31	36
1989-06-30	19
1989-12-31	23
1990-06-30	47
1990-12-31	10
1991-06-30	21
1991-12-31	9
1992-06-30	13
1992-12-31	14
1993-06-30	12
1993-12-31	55
1994-06-30	62
1994-12-31	58
1995-06-30	45
1995-12-31	26
1996-06-30	23
1996-12-31	39
1997-06-30	42
1997-12-31	23
1998-06-30	7
1998-12-31	2
1999-06-30	0