Bi-annual	US dollars
1987-06-30	279
1987-12-31	300
1988-06-30	300
1988-12-31	363
1989-06-30	440
1989-12-31	334
1990-06-30	354
1990-12-31	303
1991-06-30	268
1991-12-31	116
1992-06-30	137
1992-12-31	232
1993-06-30	45
1993-12-31	114
1994-06-30	137
1994-12-31	58
1995-06-30	52
1995-12-31	16
1996-06-30	37
1996-12-31	39
1997-06-30	28
1997-12-31	63
1998-06-30	43
1998-12-31	23
1999-06-30	27