Bi-annual	US dollars
1987-06-30	2
1987-12-31	0
1988-06-30	9
1988-12-31	170
1989-06-30	79
1989-12-31	252
1990-06-30	115
1990-12-31	62
1991-06-30	58
1991-12-31	105
1992-06-30	131
1992-12-31	68
1993-06-30	62
1993-12-31	21
1994-06-30	9
1994-12-31	33
1995-06-30	49
1995-12-31	48
1996-06-30	34
1996-12-31	31
1997-06-30	47
1997-12-31	35
1998-06-30	20
1998-12-31	10
1999-06-30	8