Bi-annual	US dollars
1987-06-30	13
1987-12-31	8
1988-06-30	7
1988-12-31	9
1989-06-30	6
1989-12-31	3
1990-06-30	2
1990-12-31	2
1991-06-30	3
1991-12-31	9
1992-06-30	4
1992-12-31	5
1993-06-30	6
1993-12-31	4
1994-06-30	3
1994-12-31	19
1995-06-30	19
1995-12-31	19
1996-06-30	20
1996-12-31	17
1997-06-30	20
1997-12-31	16
1998-06-30	15
1998-12-31	13
1999-06-30	5