Bi-annual	US dollars
1987-06-30	11
1987-12-31	17
1988-06-30	142
1988-12-31	14
1989-06-30	60
1989-12-31	77
1990-06-30	47
1990-12-31	15
1991-06-30	41
1991-12-31	50
1992-06-30	59
1992-12-31	52
1993-06-30	42
1993-12-31	59
1994-06-30	17
1994-12-31	61
1995-06-30	56
1995-12-31	64
1996-06-30	37
1996-12-31	53
1997-06-30	90
1997-12-31	67
1998-06-30	147
1998-12-31	45
1999-06-30	61