Bi-annual	US dollars
1987-06-30	19
1987-12-31	13
1988-06-30	17
1988-12-31	29
1989-06-30	22
1989-12-31	24
1990-06-30	9
1990-12-31	12
1991-06-30	10
1991-12-31	13
1992-06-30	40
1992-12-31	29
1993-06-30	24
1993-12-31	18
1994-06-30	9
1994-12-31	6
1995-06-30	6
1995-12-31	16
1996-06-30	6
1996-12-31	53
1997-06-30	85
1997-12-31	8
1998-06-30	40
1998-12-31	60
1999-06-30	0