Bi-annual	US dollars
1987-06-30	2
1987-12-31	2
1988-06-30	12
1988-12-31	4
1989-06-30	11
1989-12-31	8
1990-06-30	7
1990-12-31	2
1991-06-30	5
1991-12-31	7
1992-06-30	11
1992-12-31	8
1993-06-30	12
1993-12-31	40
1994-06-30	39
1994-12-31	14
1995-06-30	22
1995-12-31	20
1996-06-30	59
1996-12-31	58
1997-06-30	25
1997-12-31	21
1998-06-30	23
1998-12-31	22
1999-06-30	35