Bi-annual	US dollars
1987-06-30	724
1987-12-31	753
1988-06-30	759
1988-12-31	830
1989-06-30	628
1989-12-31	487
1990-06-30	358
1990-12-31	363
1991-06-30	326
1991-12-31	331
1992-06-30	291
1992-12-31	253
1993-06-30	197
1993-12-31	177
1994-06-30	187
1994-12-31	208
1995-06-30	192
1995-12-31	223
1996-06-30	244
1996-12-31	192
1997-06-30	148
1997-12-31	114
1998-06-30	108
1998-12-31	90
1999-06-30	101