Bi-annual	US dollars
1987-06-30	11
1987-12-31	17
1988-06-30	14
1988-12-31	13
1989-06-30	9
1989-12-31	32
1990-06-30	26
1990-12-31	14
1991-06-30	0
1991-12-31	157
1992-06-30	8
1992-12-31	26
1993-06-30	56
1993-12-31	102
1994-06-30	160
1994-12-31	103
1995-06-30	35
1995-12-31	37
1996-06-30	42
1996-12-31	12
1997-06-30	30
1997-12-31	41
1998-06-30	22
1998-12-31	43
1999-06-30	28