Bi-annual	US dollars
1987-06-30	71
1987-12-31	81
1988-06-30	29
1988-12-31	34
1989-06-30	59
1989-12-31	45
1990-06-30	70
1990-12-31	52
1991-06-30	62
1991-12-31	168
1992-06-30	291
1992-12-31	229
1993-06-30	446
1993-12-31	242
1994-06-30	316
1994-12-31	343
1995-06-30	342
1995-12-31	465
1996-06-30	362
1996-12-31	236
1997-06-30	225
1997-12-31	296
1998-06-30	557
1998-12-31	328
1999-06-30	298