Bi-annual	US dollars
1987-06-30	10
1987-12-31	30
1988-06-30	7
1988-12-31	5
1989-06-30	9
1989-12-31	8
1990-06-30	10
1990-12-31	15
1991-06-30	13
1991-12-31	7
1992-06-30	6
1992-12-31	6
1993-06-30	12
1993-12-31	6
1994-06-30	9
1994-12-31	9
1995-06-30	10
1995-12-31	8
1996-06-30	11
1996-12-31	14
1997-06-30	12
1997-12-31	13
1998-06-30	18
1998-12-31	17
1999-06-30	14