Bi-annual	US dollars
1987-06-30	77
1987-12-31	70
1988-06-30	49
1988-12-31	45
1989-06-30	43
1989-12-31	29
1990-06-30	91
1990-12-31	50
1991-06-30	60
1991-12-31	32
1992-06-30	29
1992-12-31	42
1993-06-30	69
1993-12-31	90
1994-06-30	119
1994-12-31	106
1995-06-30	132
1995-12-31	149
1996-06-30	113
1996-12-31	86
1997-06-30	100
1997-12-31	115
1998-06-30	110
1998-12-31	128
1999-06-30	172