Bi-annual	US dollars
1987-06-30	0
1987-12-31	0
1988-06-30	3
1988-12-31	5
1989-06-30	8
1989-12-31	8
1990-06-30	7
1990-12-31	8
1991-06-30	8
1991-12-31	11
1992-06-30	15
1992-12-31	18
1993-06-30	20
1993-12-31	21
1994-06-30	25
1994-12-31	38
1995-06-30	37
1995-12-31	36
1996-06-30	34
1996-12-31	33
1997-06-30	35
1997-12-31	43
1998-06-30	43
1998-12-31	33
1999-06-30	27