Bi-annual	US dollars
1987-06-30	3
1987-12-31	9
1988-06-30	14
1988-12-31	9
1989-06-30	17
1989-12-31	18
1990-06-30	19
1990-12-31	17
1991-06-30	18
1991-12-31	17
1992-06-30	23
1992-12-31	26
1993-06-30	6
1993-12-31	93
1994-06-30	106
1994-12-31	100
1995-06-30	113
1995-12-31	96
1996-06-30	118
1996-12-31	122
1997-06-30	101
1997-12-31	148
1998-06-30	217
1998-12-31	220
1999-06-30	224