Bi-annual	US dollars
1987-06-30	443
1987-12-31	413
1988-06-30	489
1988-12-31	443
1989-06-30	702
1989-12-31	690
1990-06-30	739
1990-12-31	685
1991-06-30	769
1991-12-31	713
1992-06-30	948
1992-12-31	897
1993-06-30	764
1993-12-31	907
1994-06-30	860
1994-12-31	1014
1995-06-30	1007
1995-12-31	1045
1996-06-30	879
1996-12-31	1188
1997-06-30	1539
1997-12-31	1617
1998-06-30	1884
1998-12-31	2331
1999-06-30	2272