Bi-annual	US dollars
1987-06-30	119
1987-12-31	126
1988-06-30	101
1988-12-31	119
1989-06-30	126
1989-12-31	97
1990-06-30	84
1990-12-31	85
1991-06-30	97
1991-12-31	99
1992-06-30	114
1992-12-31	83
1993-06-30	201
1993-12-31	213
1994-06-30	264
1994-12-31	283
1995-06-30	291
1995-12-31	228
1996-06-30	277
1996-12-31	414
1997-06-30	403
1997-12-31	403
1998-06-30	462
1998-12-31	476
1999-06-30	519