Bi-annual	US dollars
1987-06-30	906
1987-12-31	945
1988-06-30	1030
1988-12-31	909
1989-06-30	922
1989-12-31	906
1990-06-30	1020
1990-12-31	596
1991-06-30	608
1991-12-31	665
1992-06-30	834
1992-12-31	715
1993-06-30	1040
1993-12-31	834
1994-06-30	807
1994-12-31	1131
1995-06-30	1039
1995-12-31	949
1996-06-30	1131
1996-12-31	1103
1997-06-30	918
1997-12-31	1007
1998-06-30	987
1998-12-31	983
1999-06-30	1340