Bi-annual	US dollars
1987-06-30	235
1987-12-31	206
1988-06-30	251
1988-12-31	262
1989-06-30	233
1989-12-31	248
1990-06-30	227
1990-12-31	257
1991-06-30	209
1991-12-31	252
1992-06-30	238
1992-12-31	47
1993-06-30	81
1993-12-31	24
1994-06-30	23
1994-12-31	19
1995-06-30	16
1995-12-31	16
1996-06-30	16
1996-12-31	15
1997-06-30	2
1997-12-31	3
1998-06-30	0
1998-12-31	0
1999-06-30	0