Bi-annual	US dollars
1987-06-30	269
1987-12-31	149
1988-06-30	89
1988-12-31	78
1989-06-30	95
1989-12-31	98
1990-06-30	65
1990-12-31	81
1991-06-30	78
1991-12-31	88
1992-06-30	107
1992-12-31	32
1993-06-30	216
1993-12-31	605
1994-06-30	397
1994-12-31	565
1995-06-30	716
1995-12-31	881
1996-06-30	440
1996-12-31	322
1997-06-30	1010
1997-12-31	754
1998-06-30	449
1998-12-31	737
1999-06-30	601