Bi-annual	US dollars
1987-06-30	124
1987-12-31	149
1988-06-30	135
1988-12-31	118
1989-06-30	132
1989-12-31	63
1990-06-30	80
1990-12-31	135
1991-06-30	57
1991-12-31	24
1992-06-30	86
1992-12-31	86
1993-06-30	47
1993-12-31	185
1994-06-30	153
1994-12-31	102
1995-06-30	121
1995-12-31	91
1996-06-30	56
1996-12-31	122
1997-06-30	148
1997-12-31	90
1998-06-30	310
1998-12-31	111
1999-06-30	240