Bi-annual	US dollars
1987-06-30	198
1987-12-31	142
1988-06-30	145
1988-12-31	118
1989-06-30	119
1989-12-31	100
1990-06-30	91
1990-12-31	87
1991-06-30	34
1991-12-31	88
1992-06-30	74
1992-12-31	76
1993-06-30	62
1993-12-31	81
1994-06-30	39
1994-12-31	55
1995-06-30	73
1995-12-31	68
1996-06-30	50
1996-12-31	36
1997-06-30	85
1997-12-31	94
1998-06-30	75
1998-12-31	196
1999-06-30	126