Bi-annual	US dollars
1987-06-30	32
1987-12-31	12
1988-06-30	51
1988-12-31	324
1989-06-30	334
1989-12-31	372
1990-06-30	500
1990-12-31	269
1991-06-30	425
1991-12-31	646
1992-06-30	581
1992-12-31	465
1993-06-30	503
1993-12-31	602
1994-06-30	689
1994-12-31	709
1995-06-30	715
1995-12-31	642
1996-06-30	744
1996-12-31	823
1997-06-30	693
1997-12-31	12215
1998-06-30	11329
1998-12-31	11708
1999-06-30	11774