Bi-annual	US dollars
1987-06-30	5
1987-12-31	6
1988-06-30	5
1988-12-31	4
1989-06-30	5
1989-12-31	3
1990-06-30	10
1990-12-31	10
1991-06-30	11
1991-12-31	19
1992-06-30	17
1992-12-31	8
1993-06-30	12
1993-12-31	22
1994-06-30	35
1994-12-31	56
1995-06-30	60
1995-12-31	93
1996-06-30	99
1996-12-31	118
1997-06-30	148
1997-12-31	54
1998-06-30	37
1998-12-31	62
1999-06-30	43