Bi-annual	US dollars
1987-06-30	61
1987-12-31	38
1988-06-30	53
1988-12-31	20
1989-06-30	50
1989-12-31	92
1990-06-30	68
1990-12-31	81
1991-06-30	154
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	116
1995-12-31	788
1996-06-30	228
1996-12-31	385
1997-06-30	394
1997-12-31	392
1998-06-30	312
1998-12-31	240
1999-06-30	221