Bi-annual	US dollars
1987-06-30	66
1987-12-31	83
1988-06-30	65
1988-12-31	141
1989-06-30	95
1989-12-31	116
1990-06-30	120
1990-12-31	141
1991-06-30	256
1991-12-31	265
1992-06-30	270
1992-12-31	265
1993-06-30	147
1993-12-31	72
1994-06-30	96
1994-12-31	106
1995-06-30	165
1995-12-31	126
1996-06-30	140
1996-12-31	233
1997-06-30	123
1997-12-31	76
1998-06-30	202
1998-12-31	97
1999-06-30	197