Bi-annual	US dollars
1987-06-30	214
1987-12-31	202
1988-06-30	203
1988-12-31	132
1989-06-30	316
1989-12-31	360
1990-06-30	274
1990-12-31	257
1991-06-30	366
1991-12-31	159
1992-06-30	272
1992-12-31	224
1993-06-30	311
1993-12-31	294
1994-06-30	318
1994-12-31	538
1995-06-30	916
1995-12-31	1090
1996-06-30	853
1996-12-31	1049
1997-06-30	1040
1997-12-31	1433
1998-06-30	894
1998-12-31	1558
1999-06-30	1474