Bi-annual	US dollars
1987-06-30	44
1987-12-31	11
1988-06-30	19
1988-12-31	9
1989-06-30	48
1989-12-31	79
1990-06-30	37
1990-12-31	44
1991-06-30	37
1991-12-31	77
1992-06-30	49
1992-12-31	58
1993-06-30	87
1993-12-31	251
1994-06-30	19
1994-12-31	33
1995-06-30	30
1995-12-31	65
1996-06-30	62
1996-12-31	84
1997-06-30	52
1997-12-31	43
1998-06-30	43
1998-12-31	13
1999-06-30	5