Bi-annual	US dollars
1987-06-30	15
1987-12-31	15
1988-06-30	15
1988-12-31	9
1989-06-30	14
1989-12-31	32
1990-06-30	115
1990-12-31	8
1991-06-30	18
1991-12-31	21
1992-06-30	49
1992-12-31	38
1993-06-30	42
1993-12-31	16
1994-06-30	77
1994-12-31	9
1995-06-30	116
1995-12-31	43
1996-06-30	20
1996-12-31	33
1997-06-30	48
1997-12-31	87
1998-06-30	135
1998-12-31	151
1999-06-30	88