Bi-annual	US dollars
1987-06-30	48
1987-12-31	23
1988-06-30	48
1988-12-31	40
1989-06-30	37
1989-12-31	10
1990-06-30	24
1990-12-31	10
1991-06-30	8
1991-12-31	17
1992-06-30	23
1992-12-31	20
1993-06-30	20
1993-12-31	19
1994-06-30	40
1994-12-31	23
1995-06-30	17
1995-12-31	20
1996-06-30	30
1996-12-31	27
1997-06-30	32
1997-12-31	28
1998-06-30	30
1998-12-31	20
1999-06-30	20