Bi-annual	US dollars
1987-06-30	5
1987-12-31	4
1988-06-30	2
1988-12-31	4
1989-06-30	6
1989-12-31	5
1990-06-30	7
1990-12-31	8
1991-06-30	8
1991-12-31	11
1992-06-30	13
1992-12-31	12
1993-06-30	24
1993-12-31	30
1994-06-30	37
1994-12-31	34
1995-06-30	48
1995-12-31	45
1996-06-30	50
1996-12-31	19
1997-06-30	33
1997-12-31	13
1998-06-30	37
1998-12-31	28
1999-06-30	24