Bi-annual	US dollars
1987-06-30	185306
1987-12-31	210574
1988-06-30	205362
1988-12-31	209209
1989-06-30	216054
1989-12-31	212715
1990-06-30	221669
1990-12-31	230575
1991-06-30	207938
1991-12-31	219910
1992-06-30	230907
1992-12-31	227989
1993-06-30	286100
1993-12-31	280762
1994-06-30	300310
1994-12-31	297557
1995-06-30	320644
1995-12-31	310738
1996-06-30	316067
1996-12-31	348881
1997-06-30	445366
1997-12-31	202578
1998-06-30	214223
1998-12-31	192961
1999-06-30	201490