Bi-annual	US dollars
1987-06-30	279
1987-12-31	294
1988-06-30	259
1988-12-31	210
1989-06-30	219
1989-12-31	268
1990-06-30	145
1990-12-31	233
1991-06-30	232
1991-12-31	491
1992-06-30	190
1992-12-31	251
1993-06-30	333
1993-12-31	474
1994-06-30	554
1994-12-31	1012
1995-06-30	662
1995-12-31	591
1996-06-30	528
1996-12-31	640
1997-06-30	729
1997-12-31	1014
1998-06-30	774
1998-12-31	1148
1999-06-30	1246