Bi-annual	US dollars
1987-06-30	3
1987-12-31	4
1988-06-30	2
1988-12-31	2
1989-06-30	3
1989-12-31	2
1990-06-30	0
1990-12-31	21
1991-06-30	26
1991-12-31	11
1992-06-30	17
1992-12-31	311
1993-06-30	249
1993-12-31	207
1994-06-30	230
1994-12-31	249
1995-06-30	253
1995-12-31	279
1996-06-30	294
1996-12-31	318
1997-06-30	286
1997-12-31	270
1998-06-30	387
1998-12-31	233
1999-06-30	235