Bi-annual	US dollars
1987-06-30	39
1987-12-31	30
1988-06-30	26
1988-12-31	27
1989-06-30	25
1989-12-31	21
1990-06-30	17
1990-12-31	17
1991-06-30	15
1991-12-31	9
1992-06-30	8
1992-12-31	6
1993-06-30	6
1993-12-31	3
1994-06-30	3
1994-12-31	0
1995-06-30	2
1995-12-31	2
1996-06-30	6
1996-12-31	26
1997-06-30	35
1997-12-31	26
1998-06-30	25
1998-12-31	18
1999-06-30	16