Bi-annual	US dollars
1987-06-30	216
1987-12-31	174
1988-06-30	171
1988-12-31	152
1989-06-30	109
1989-12-31	95
1990-06-30	75
1990-12-31	39
1991-06-30	55
1991-12-31	45
1992-06-30	103
1992-12-31	80
1993-06-30	173
1993-12-31	102
1994-06-30	86
1994-12-31	77
1995-06-30	83
1995-12-31	90
1996-06-30	90
1996-12-31	89
1997-06-30	62
1997-12-31	84
1998-06-30	87
1998-12-31	93
1999-06-30	66