Bi-annual	US dollars
1987-06-30	555
1987-12-31	472
1988-06-30	640
1988-12-31	448
1989-06-30	670
1989-12-31	293
1990-06-30	215
1990-12-31	581
1991-06-30	293
1991-12-31	217
1992-06-30	266
1992-12-31	332
1993-06-30	372
1993-12-31	371
1994-06-30	386
1994-12-31	283
1995-06-30	278
1995-12-31	347
1996-06-30	493
1996-12-31	464
1997-06-30	378
1997-12-31	513
1998-06-30	697
1998-12-31	383
1999-06-30	628