Bi-annual	US dollars
1987-06-30	145
1987-12-31	202
1988-06-30	237
1988-12-31	282
1989-06-30	268
1989-12-31	298
1990-06-30	237
1990-12-31	272
1991-06-30	243
1991-12-31	232
1992-06-30	242
1992-12-31	170
1993-06-30	168
1993-12-31	137
1994-06-30	120
1994-12-31	127
1995-06-30	119
1995-12-31	107
1996-06-30	98
1996-12-31	99
1997-06-30	118
1997-12-31	122
1998-06-30	202
1998-12-31	186
1999-06-30	203