Bi-annual	US dollars
1987-06-30	223
1987-12-31	125
1988-06-30	343
1988-12-31	163
1989-06-30	228
1989-12-31	237
1990-06-30	391
1990-12-31	307
1991-06-30	311
1991-12-31	303
1992-06-30	306
1992-12-31	211
1993-06-30	926
1993-12-31	706
1994-06-30	403
1994-12-31	743
1995-06-30	802
1995-12-31	828
1996-06-30	747
1996-12-31	969
1997-06-30	1050
1997-12-31	1701
1998-06-30	1024
1998-12-31	972
1999-06-30	792