Bi-annual	US dollars
1987-06-30	3
1987-12-31	6
1988-06-30	2
1988-12-31	9
1989-06-30	6
1989-12-31	6
1990-06-30	14
1990-12-31	31
1991-06-30	29
1991-12-31	41
1992-06-30	46
1992-12-31	26
1993-06-30	321
1993-12-31	58
1994-06-30	26
1994-12-31	34
1995-06-30	122
1995-12-31	39
1996-06-30	70
1996-12-31	147
1997-06-30	150
1997-12-31	82
1998-06-30	82
1998-12-31	90
1999-06-30	110