Bi-annual	US dollars
1987-06-30	18
1987-12-31	15
1988-06-30	14
1988-12-31	7
1989-06-30	11
1989-12-31	15
1990-06-30	14
1990-12-31	41
1991-06-30	36
1991-12-31	30
1992-06-30	38
1992-12-31	30
1993-06-30	101
1993-12-31	87
1994-06-30	171
1994-12-31	199
1995-06-30	218
1995-12-31	223
1996-06-30	238
1996-12-31	238
1997-06-30	158
1997-12-31	140
1998-06-30	45
1998-12-31	58
1999-06-30	54