Bi-annual	US dollars
1987-06-30	58
1987-12-31	21
1988-06-30	14
1988-12-31	20
1989-06-30	19
1989-12-31	0
1990-06-30	52
1990-12-31	48
1991-06-30	37
1991-12-31	15
1992-06-30	27
1992-12-31	35
1993-06-30	65
1993-12-31	13
1994-06-30	8
1994-12-31	0
1995-06-30	13
1995-12-31	16
1996-06-30	22
1996-12-31	21
1997-06-30	7
1997-12-31	2
1998-06-30	7
1998-12-31	60
1999-06-30	55