Bi-annual	US dollars
1987-06-30	46228
1987-12-31	51609
1988-06-30	47382
1988-12-31	45222
1989-06-30	43601
1989-12-31	46836
1990-06-30	45142
1990-12-31	47705
1991-06-30	40780
1991-12-31	45762
1992-06-30	45055
1992-12-31	44653
1993-06-30	71914
1993-12-31	72242
1994-06-30	80194
1994-12-31	80872
1995-06-30	81419
1995-12-31	89868
1996-06-30	88598
1996-12-31	93226
1997-06-30	102157
1997-12-31	100872
1998-06-30	101075
1998-12-31	90344
1999-06-30	80714