Bi-annual	US dollars
1987-06-30	197
1987-12-31	276
1988-06-30	171
1988-12-31	132
1989-06-30	375
1989-12-31	410
1990-06-30	419
1990-12-31	197
1991-06-30	517
1991-12-31	435
1992-06-30	995
1992-12-31	544
1993-06-30	557
1993-12-31	294
1994-06-30	543
1994-12-31	485
1995-06-30	1287
1995-12-31	594
1996-06-30	628
1996-12-31	632
1997-06-30	794
1997-12-31	610
1998-06-30	789
1998-12-31	348
1999-06-30	1834