Bi-annual	US dollars
1987-06-30	23
1987-12-31	30
1988-06-30	9
1988-12-31	25
1989-06-30	50
1989-12-31	26
1990-06-30	23
1990-12-31	8
1991-06-30	42
1991-12-31	9
1992-06-30	25
1992-12-31	8
1993-06-30	14
1993-12-31	38
1994-06-30	56
1994-12-31	16
1995-06-30	21
1995-12-31	16
1996-06-30	5
1996-12-31	3
1997-06-30	10
1997-12-31	56
1998-06-30	12
1998-12-31	12
1999-06-30	6