Bi-annual	US dollars
1987-06-30	111
1987-12-31	125
1988-06-30	113
1988-12-31	103
1989-06-30	48
1989-12-31	32
1990-06-30	40
1990-12-31	46
1991-06-30	37
1991-12-31	47
1992-06-30	114
1992-12-31	98
1993-06-30	48
1993-12-31	52
1994-06-30	76
1994-12-31	77
1995-06-30	102
1995-12-31	109
1996-06-30	138
1996-12-31	87
1997-06-30	126
1997-12-31	283
1998-06-30	328
1998-12-31	190
1999-06-30	221