Bi-annual	US dollars
1987-06-30	3
1987-12-31	4
1988-06-30	7
1988-12-31	2
1989-06-30	5
1989-12-31	8
1990-06-30	7
1990-12-31	2
1991-06-30	2
1991-12-31	2
1992-06-30	8
1992-12-31	6
1993-06-30	8
1993-12-31	9
1994-06-30	8
1994-12-31	5
1995-06-30	5
1995-12-31	5
1996-06-30	8
1996-12-31	5
1997-06-30	3
1997-12-31	3
1998-06-30	3
1998-12-31	20
1999-06-30	16