Bi-annual	US dollars
1987-06-30	250
1987-12-31	262
1988-06-30	271
1988-12-31	250
1989-06-30	248
1989-12-31	145
1990-06-30	141
1990-12-31	145
1991-06-30	172
1991-12-31	215
1992-06-30	169
1992-12-31	102
1993-06-30	53
1993-12-31	40
1994-06-30	34
1994-12-31	33
1995-06-30	32
1995-12-31	26
1996-06-30	28
1996-12-31	24
1997-06-30	33
1997-12-31	43
1998-06-30	30
1998-12-31	47
1999-06-30	44