Bi-annual	US dollars
1987-06-30	324
1987-12-31	391
1988-06-30	336
1988-12-31	358
1989-06-30	264
1989-12-31	743
1990-06-30	896
1990-12-31	1081
1991-06-30	1273
1991-12-31	1541
1992-06-30	1566
1992-12-31	1532
1993-06-30	1368
1993-12-31	1553
1994-06-30	1745
1994-12-31	1660
1995-06-30	1543
1995-12-31	1584
1996-06-30	893
1996-12-31	680
1997-06-30	784
1997-12-31	1116
1998-06-30	1062
1998-12-31	1151
1999-06-30	1061