Bi-annual	US dollars
1987-06-30	37
1987-12-31	109
1988-06-30	177
1988-12-31	170
1989-06-30	141
1989-12-31	134
1990-06-30	92
1990-12-31	96
1991-06-30	102
1991-12-31	60
1992-06-30	13
1992-12-31	9
1993-06-30	41
1993-12-31	59
1994-06-30	52
1994-12-31	19
1995-06-30	129
1995-12-31	141
1996-06-30	89
1996-12-31	51
1997-06-30	201
1997-12-31	117
1998-06-30	90
1998-12-31	75
1999-06-30	50