Bi-annual	US dollars
1987-06-30	405
1987-12-31	457
1988-06-30	443
1988-12-31	513
1989-06-30	429
1989-12-31	448
1990-06-30	417
1990-12-31	540
1991-06-30	261
1991-12-31	209
1992-06-30	152
1992-12-31	94
1993-06-30	71
1993-12-31	81
1994-06-30	54
1994-12-31	47
1995-06-30	49
1995-12-31	389
1996-06-30	37
1996-12-31	43
1997-06-30	40
1997-12-31	43
1998-06-30	43
1998-12-31	42
1999-06-30	43