Bi-annual	US dollars
1987-06-30	147
1987-12-31	149
1988-06-30	309
1988-12-31	130
1989-06-30	200
1989-12-31	60
1990-06-30	58
1990-12-31	52
1991-06-30	81
1991-12-31	54
1992-06-30	74
1992-12-31	165
1993-06-30	209
1993-12-31	155
1994-06-30	151
1994-12-31	208
1995-06-30	151
1995-12-31	146
1996-06-30	137
1996-12-31	123
1997-06-30	180
1997-12-31	388
1998-06-30	837
1998-12-31	834
1999-06-30	981