Bi-annual	US dollars
1987-06-30	16
1987-12-31	17
1988-06-30	17
1988-12-31	7
1989-06-30	37
1989-12-31	26
1990-06-30	3
1990-12-31	62
1991-06-30	60
1991-12-31	19
1992-06-30	40
1992-12-31	76
1993-06-30	12
1993-12-31	65
1994-06-30	42
1994-12-31	33
1995-06-30	40
1995-12-31	44
1996-06-30	42
1996-12-31	0
1997-06-30	13
1997-12-31	5
1998-06-30	58
1998-12-31	67
1999-06-30	22