Bi-annual	US dollars
1987-06-30	479
1987-12-31	509
1988-06-30	517
1988-12-31	513
1989-06-30	513
1989-12-31	390
1990-06-30	408
1990-12-31	15
1991-06-30	28
1991-12-31	62
1992-06-30	93
1992-12-31	79
1993-06-30	243
1993-12-31	103
1994-06-30	59
1994-12-31	38
1995-06-30	21
1995-12-31	25
1996-06-30	16
1996-12-31	79
1997-06-30	53
1997-12-31	77
1998-06-30	167
1998-12-31	151
1999-06-30	55