Bi-annual	US dollars
1987-06-30	285
1987-12-31	391
1988-06-30	384
1988-12-31	649
1989-06-30	657
1989-12-31	642
1990-06-30	270
1990-12-31	222
1991-06-30	308
1991-12-31	215
1992-06-30	147
1992-12-31	227
1993-06-30	117
1993-12-31	296
1994-06-30	28
1994-12-31	100
1995-06-30	89
1995-12-31	68
1996-06-30	68
1996-12-31	60
1997-06-30	68
1997-12-31	179
1998-06-30	135
1998-12-31	45
1999-06-30	38