Bi-annual	US dollars
1987-06-30	19
1987-12-31	17
1988-06-30	19
1988-12-31	24
1989-06-30	2
1989-12-31	10
1990-06-30	16
1990-12-31	0
1991-06-30	2
1991-12-31	17
1992-06-30	8
1992-12-31	18
1993-06-30	56
1993-12-31	33
1994-06-30	57
1994-12-31	47
1995-06-30	56
1995-12-31	45
1996-06-30	23
1996-12-31	103
1997-06-30	101
1997-12-31	165
1998-06-30	372
1998-12-31	311
1999-06-30	279