Bi-annual	US dollars
1987-06-30	176
1987-12-31	162
1988-06-30	164
1988-12-31	181
1989-06-30	256
1989-12-31	247
1990-06-30	220
1990-12-31	145
1991-06-30	120
1991-12-31	112
1992-06-30	122
1992-12-31	135
1993-06-30	41
1993-12-31	47
1994-06-30	60
1994-12-31	64
1995-06-30	65
1995-12-31	82
1996-06-30	76
1996-12-31	45
1997-06-30	73
1997-12-31	76
1998-06-30	105
1998-12-31	98
1999-06-30	114