Bi-annual	US dollars
1987-06-30	92
1987-12-31	164
1988-06-30	269
1988-12-31	297
1989-06-30	285
1989-12-31	350
1990-06-30	333
1990-12-31	343
1991-06-30	319
1991-12-31	217
1992-06-30	421
1992-12-31	170
1993-06-30	194
1993-12-31	50
1994-06-30	94
1994-12-31	105
1995-06-30	110
1995-12-31	104
1996-06-30	53
1996-12-31	111
1997-06-30	42
1997-12-31	123
1998-06-30	288
1998-12-31	275
1999-06-30	210