Bi-annual	US dollars
1987-06-30	308
1987-12-31	306
1988-06-30	634
1988-12-31	246
1989-06-30	167
1989-12-31	189
1990-06-30	345
1990-12-31	195
1991-06-30	182
1991-12-31	829
1992-06-30	1119
1992-12-31	498
1993-06-30	2398
1993-12-31	2301
1994-06-30	1113
1994-12-31	1017
1995-06-30	1553
1995-12-31	2050
1996-06-30	2130
1996-12-31	1363
1997-06-30	1319
1997-12-31	739
1998-06-30	612
1998-12-31	676
1999-06-30	629