Bi-annual	US dollars
1987-06-30	3
1987-12-31	9
1988-06-30	31
1988-12-31	24
1989-06-30	20
1989-12-31	18
1990-06-30	21
1990-12-31	29
1991-06-30	24
1991-12-31	21
1992-06-30	13
1992-12-31	2
1993-06-30	8
1993-12-31	7
1994-06-30	37
1994-12-31	145
1995-06-30	14
1995-12-31	14
1996-06-30	11
1996-12-31	50
1997-06-30	47
1997-12-31	77
1998-06-30	87
1998-12-31	83
1999-06-30	68