Bi-annual	US dollars
1987-06-30	60
1987-12-31	66
1988-06-30	56
1988-12-31	47
1989-06-30	40
1989-12-31	50
1990-06-30	44
1990-12-31	44
1991-06-30	63
1991-12-31	84
1992-06-30	49
1992-12-31	55
1993-06-30	146
1993-12-31	92
1994-06-30	42
1994-12-31	97
1995-06-30	67
1995-12-31	84
1996-06-30	117
1996-12-31	257
1997-06-30	77
1997-12-31	250
1998-06-30	128
1998-12-31	87
1999-06-30	112