Bi-annual	US dollars
1987-06-30	332
1987-12-31	236
1988-06-30	164
1988-12-31	134
1989-06-30	124
1989-12-31	139
1990-06-30	96
1990-12-31	131
1991-06-30	97
1991-12-31	88
1992-06-30	103
1992-12-31	120
1993-06-30	254
1993-12-31	344
1994-06-30	673
1994-12-31	513
1995-06-30	703
1995-12-31	625
1996-06-30	659
1996-12-31	878
1997-06-30	870
1997-12-31	1213
1998-06-30	1220
1998-12-31	1363
1999-06-30	1047