Bi-annual	US dollars
1987-06-30	73
1987-12-31	72
1988-06-30	49
1988-12-31	47
1989-06-30	39
1989-12-31	27
1990-06-30	24
1990-12-31	21
1991-06-30	19
1991-12-31	19
1992-06-30	21
1992-12-31	15
1993-06-30	12
1993-12-31	18
1994-06-30	19
1994-12-31	19
1995-06-30	25
1995-12-31	28
1996-06-30	48
1996-12-31	87
1997-06-30	278
1997-12-31	132
1998-06-30	140
1998-12-31	203
1999-06-30	117