Bi-annual	US dollars
1987-06-30	116
1987-12-31	123
1988-06-30	111
1988-12-31	107
1989-06-30	109
1989-12-31	106
1990-06-30	136
1990-12-31	183
1991-06-30	120
1991-12-31	185
1992-06-30	154
1992-12-31	368
1993-06-30	200
1993-12-31	352
1994-06-30	335
1994-12-31	604
1995-06-30	447
1995-12-31	521
1996-06-30	432
1996-12-31	380
1997-06-30	853
1997-12-31	763
1998-06-30	787
1998-12-31	727
1999-06-30	858