Bi-annual	US dollars
1987-06-30	621
1987-12-31	613
1988-06-30	650
1988-12-31	635
1989-06-30	566
1989-12-31	564
1990-06-30	520
1990-12-31	515
1991-06-30	392
1991-12-31	435
1992-06-30	417
1992-12-31	239
1993-06-30	185
1993-12-31	106
1994-06-30	91
1994-12-31	77
1995-06-30	59
1995-12-31	45
1996-06-30	34
1996-12-31	33
1997-06-30	18
1997-12-31	16
1998-06-30	7
1998-12-31	3
1999-06-30	3