Bi-annual	US dollars
1987-06-30	56
1987-12-31	53
1988-06-30	36
1988-12-31	16
1989-06-30	9
1989-12-31	13
1990-06-30	26
1990-12-31	41
1991-06-30	31
1991-12-31	7
1992-06-30	10
1992-12-31	11
1993-06-30	21
1993-12-31	22
1994-06-30	8
1994-12-31	14
1995-06-30	11
1995-12-31	31
1996-06-30	39
1996-12-31	21
1997-06-30	17
1997-12-31	7
1998-06-30	15
1998-12-31	8
1999-06-30	19