Bi-annual	US dollars
1987-06-30	564
1987-12-31	872
1988-06-30	919
1988-12-31	770
1989-06-30	530
1989-12-31	476
1990-06-30	497
1990-12-31	320
1991-06-30	229
1991-12-31	263
1992-06-30	284
1992-12-31	386
1993-06-30	362
1993-12-31	303
1994-06-30	164
1994-12-31	78
1995-06-30	80
1995-12-31	68
1996-06-30	44
1996-12-31	51
1997-06-30	62
1997-12-31	82
1998-06-30	132
1998-12-31	130
1999-06-30	128