Bi-annual	US dollars
1987-06-30	79
1987-12-31	70
1988-06-30	41
1988-12-31	38
1989-06-30	40
1989-12-31	29
1990-06-30	21
1990-12-31	14
1991-06-30	16
1991-12-31	7
1992-06-30	6
1992-12-31	3
1993-06-30	2
1993-12-31	4
1994-06-30	8
1994-12-31	5
1995-06-30	6
1995-12-31	3
1996-06-30	6
1996-12-31	9
1997-06-30	7
1997-12-31	10
1998-06-30	25
1998-12-31	23
1999-06-30	20