Bi-annual	US dollars
1987-06-30	84
1987-12-31	119
1988-06-30	118
1988-12-31	103
1989-06-30	91
1989-12-31	60
1990-06-30	56
1990-12-31	27
1991-06-30	24
1991-12-31	21
1992-06-30	13
1992-12-31	5
1993-06-30	24
1993-12-31	15
1994-06-30	6
1994-12-31	34
1995-06-30	16
1995-12-31	22
1996-06-30	39
1996-12-31	38
1997-06-30	35
1997-12-31	30
1998-06-30	97
1998-12-31	148
1999-06-30	145