Bi-annual	US dollars
1987-06-30	5
1987-12-31	6
1988-06-30	0
1988-12-31	2
1989-06-30	5
1989-12-31	18
1990-06-30	14
1990-12-31	29
1991-06-30	15
1991-12-31	24
1992-06-30	11
1992-12-31	24
1993-06-30	32
1993-12-31	31
1994-06-30	34
1994-12-31	38
1995-06-30	38
1995-12-31	26
1996-06-30	5
1996-12-31	7
1997-06-30	40
1997-12-31	20
1998-06-30	18
1998-12-31	33
1999-06-30	54