Bi-annual	US dollars
1987-06-30	264
1987-12-31	294
1988-06-30	237
1988-12-31	108
1989-06-30	45
1989-12-31	61
1990-06-30	30
1990-12-31	71
1991-06-30	310
1991-12-31	280
1992-06-30	206
1992-12-31	147
1993-06-30	158
1993-12-31	712
1994-06-30	715
1994-12-31	768
1995-06-30	713
1995-12-31	817
1996-06-30	834
1996-12-31	1065
1997-06-30	858
1997-12-31	939
1998-06-30	485
1998-12-31	456
1999-06-30	468