Bi-annual	US dollars
1987-06-30	2
1987-12-31	2
1988-06-30	3
1988-12-31	5
1989-06-30	5
1989-12-31	8
1990-06-30	2
1990-12-31	4
1991-06-30	5
1991-12-31	7
1992-06-30	19
1992-12-31	50
1993-06-30	56
1993-12-31	72
1994-06-30	1312
1994-12-31	1472
1995-06-30	1314
1995-12-31	1307
1996-06-30	1094
1996-12-31	1334
1997-06-30	823
1997-12-31	814
1998-06-30	1007
1998-12-31	2236
1999-06-30	700