Bi-annual	US dollars
1987-06-30	316
1987-12-31	711
1988-06-30	551
1988-12-31	1134
1989-06-30	741
1989-12-31	747
1990-06-30	746
1990-12-31	839
1991-06-30	790
1991-12-31	844
1992-06-30	270
1992-12-31	317
1993-06-30	303
1993-12-31	290
1994-06-30	432
1994-12-31	463
1995-06-30	418
1995-12-31	459
1996-06-30	393
1996-12-31	604
1997-06-30	872
1997-12-31	2208
1998-06-30	647
1998-12-31	572
1999-06-30	777