Bi-annual	US dollars
1987-06-30	135
1987-12-31	126
1988-06-30	101
1988-12-31	103
1989-06-30	82
1989-12-31	23
1990-06-30	14
1990-12-31	44
1991-06-30	57
1991-12-31	60
1992-06-30	59
1992-12-31	41
1993-06-30	162
1993-12-31	248
1994-06-30	287
1994-12-31	338
1995-06-30	305
1995-12-31	274
1996-06-30	103
1996-12-31	270
1997-06-30	208
1997-12-31	166
1998-06-30	263
1998-12-31	779
1999-06-30	303