Bi-annual	US dollars
1987-06-30	77
1987-12-31	87
1988-06-30	75
1988-12-31	72
1989-06-30	12
1989-12-31	15
1990-06-30	30
1990-12-31	29
1991-06-30	49
1991-12-31	17
1992-06-30	89
1992-12-31	48
1993-06-30	78
1993-12-31	112
1994-06-30	125
1994-12-31	113
1995-06-30	177
1995-12-31	171
1996-06-30	224
1996-12-31	176
1997-06-30	328
1997-12-31	174
1998-06-30	287
1998-12-31	359
1999-06-30	374