Bi-annual	US dollars
1987-06-30	-10
1987-12-31	4
1988-06-30	5
1988-12-31	4
1989-06-30	6
1989-12-31	8
1990-06-30	9
1990-12-31	14
1991-06-30	11
1991-12-31	9
1992-06-30	11
1992-12-31	8
1993-06-30	44
1993-12-31	58
1994-06-30	68
1994-12-31	78
1995-06-30	105
1995-12-31	113
1996-06-30	124
1996-12-31	142
1997-06-30	166
1997-12-31	216
1998-06-30	272
1998-12-31	290
1999-06-30	293