Bi-annual	US dollars
1987-06-30	63
1987-12-31	38
1988-06-30	53
1988-12-31	20
1989-06-30	50
1989-12-31	92
1990-06-30	72
1990-12-31	83
1991-06-30	156
1991-12-31	121
1992-06-30	131
1992-12-31	92
1993-06-30	105
1993-12-31	77
1994-06-30	66
1994-12-31	66
1995-06-30	157
1995-12-31	799
1996-06-30	287
1996-12-31	397
1997-06-30	404
1997-12-31	401
1998-06-30	312
1998-12-31	241
1999-06-30	221