Bi-annual	US dollars
1987-06-30	6
1987-12-31	8
1988-06-30	2
1988-12-31	9
1989-06-30	6
1989-12-31	0
1990-06-30	5
1990-12-31	21
1991-06-30	31
1991-12-31	13
1992-06-30	13
1992-12-31	8
1993-06-30	14
1993-12-31	24
1994-06-30	49
1994-12-31	53
1995-06-30	65
1995-12-31	50
1996-06-30	33
1996-12-31	17
1997-06-30	8
1997-12-31	10
1998-06-30	27
1998-12-31	15
1999-06-30	27