Bi-annual	US dollars
1987-06-30	103
1987-12-31	102
1988-06-30	99
1988-12-31	96
1989-06-30	102
1989-12-31	85
1990-06-30	80
1990-12-31	89
1991-06-30	75
1991-12-31	67
1992-06-30	53
1992-12-31	45
1993-06-30	36
1993-12-31	30
1994-06-30	19
1994-12-31	14
1995-06-30	10
1995-12-31	11
1996-06-30	11
1996-12-31	10
1997-06-30	2
1997-12-31	2
1998-06-30	0
1998-12-31	0
1999-06-30	2