Bi-annual	US dollars
1987-06-30	1317
1987-12-31	217
1988-06-30	285
1988-12-31	193
1989-06-30	212
1989-12-31	268
1990-06-30	187
1990-12-31	220
1991-06-30	139
1991-12-31	200
1992-06-30	67
1992-12-31	359
1993-06-30	24
1993-12-31	145
1994-06-30	443
1994-12-31	358
1995-06-30	310
1995-12-31	448
1996-06-30	1011
1996-12-31	878
1997-06-30	987
1997-12-31	405
1998-06-30	415
1998-12-31	516
1999-06-30	6