Bi-annual	US dollars
1987-06-30	121
1987-12-31	115
1988-06-30	201
1988-12-31	155
1989-06-30	122
1989-12-31	69
1990-06-30	140
1990-12-31	183
1991-06-30	112
1991-12-31	123
1992-06-30	126
1992-12-31	76
1993-06-30	296
1993-12-31	86
1994-06-30	128
1994-12-31	27
1995-06-30	48
1995-12-31	42
1996-06-30	132
1996-12-31	75
1997-06-30	83
1997-12-31	41
1998-06-30	52
1998-12-31	20
1999-06-30	47