Bi-annual	US dollars
1987-06-30	24
1987-12-31	15
1988-06-30	3
1988-12-31	108
1989-06-30	161
1989-12-31	168
1990-06-30	190
1990-12-31	197
1991-06-30	76
1991-12-31	90
1992-06-30	55
1992-12-31	11
1993-06-30	56
1993-12-31	37
1994-06-30	102
1994-12-31	48
1995-06-30	103
1995-12-31	48
1996-06-30	168
1996-12-31	193
1997-06-30	73
1997-12-31	138
1998-06-30	227
1998-12-31	235
1999-06-30	0