Bi-annual	US dollars
1987-06-30	0
1987-12-31	13
1988-06-30	12
1988-12-31	0
1989-06-30	14
1989-12-31	15
1990-06-30	21
1990-12-31	25
1991-06-30	21
1991-12-31	22
1992-06-30	21
1992-12-31	44
1993-06-30	32
1993-12-31	41
1994-06-30	48
1994-12-31	23
1995-06-30	25
1995-12-31	14
1996-06-30	14
1996-12-31	24
1997-06-30	38
1997-12-31	20
1998-06-30	37
1998-12-31	13
1999-06-30	39