Bi-annual	US dollars
1987-06-30	61
1987-12-31	58
1988-06-30	89
1988-12-31	40
1989-06-30	22
1989-12-31	24
1990-06-30	21
1990-12-31	21
1991-06-30	10
1991-12-31	9
1992-06-30	10
1992-12-31	14
1993-06-30	11
1993-12-31	13
1994-06-30	6
1994-12-31	8
1995-06-30	8
1995-12-31	17
1996-06-30	5
1996-12-31	3
1997-06-30	2
1997-12-31	2
1998-06-30	3
1998-12-31	3
1999-06-30	11