Bi-annual	US dollars
1987-06-30	321
1987-12-31	338
1988-06-30	348
1988-12-31	425
1989-06-30	377
1989-12-31	371
1990-06-30	422
1990-12-31	332
1991-06-30	353
1991-12-31	400
1992-06-30	394
1992-12-31	273
1993-06-30	234
1993-12-31	56
1994-06-30	80
1994-12-31	72
1995-06-30	41
1995-12-31	81
1996-06-30	85
1996-12-31	108
1997-06-30	35
1997-12-31	48
1998-06-30	33
1998-12-31	45
1999-06-30	28