Bi-annual	US dollars
1987-06-30	71
1987-12-31	87
1988-06-30	65
1988-12-31	63
1989-06-30	43
1989-12-31	34
1990-06-30	35
1990-12-31	29
1991-06-30	21
1991-12-31	24
1992-06-30	13
1992-12-31	12
1993-06-30	8
1993-12-31	27
1994-06-30	23
1994-12-31	53
1995-06-30	51
1995-12-31	29
1996-06-30	37
1996-12-31	48
1997-06-30	23
1997-12-31	10
1998-06-30	13
1998-12-31	30
1999-06-30	14