Bi-annual	US dollars
1987-06-30	1679
1987-12-31	2321
1988-06-30	1983
1988-12-31	1938
1989-06-30	1541
1989-12-31	1148
1990-06-30	799
1990-12-31	367
1991-06-30	293
1991-12-31	271
1992-06-30	221
1992-12-31	111
1993-06-30	80
1993-12-31	74
1994-06-30	54
1994-12-31	52
1995-06-30	52
1995-12-31	51
1996-06-30	53
1996-12-31	51
1997-06-30	52
1997-12-31	46
1998-06-30	45
1998-12-31	47
1999-06-30	44