Bi-annual	US dollars
1987-06-30	177
1987-12-31	168
1988-06-30	116
1988-12-31	141
1989-06-30	153
1989-12-31	134
1990-06-30	120
1990-12-31	125
1991-06-30	83
1991-12-31	84
1992-06-30	101
1992-12-31	59
1993-06-30	56
1993-12-31	216
1994-06-30	298
1994-12-31	449
1995-06-30	469
1995-12-31	544
1996-06-30	791
1996-12-31	854
1997-06-30	1018
1997-12-31	981
1998-06-30	1292
1998-12-31	1441
1999-06-30	1293