Bi-annual	US dollars
1987-06-30	11
1987-12-31	13
1988-06-30	10
1988-12-31	11
1989-06-30	11
1989-12-31	16
1990-06-30	12
1990-12-31	15
1991-06-30	10
1991-12-31	13
1992-06-30	19
1992-12-31	12
1993-06-30	14
1993-12-31	9
1994-06-30	-6
1994-12-31	2
1995-06-30	6
1995-12-31	9
1996-06-30	23
1996-12-31	58
1997-06-30	101
1997-12-31	165
1998-06-30	183
1998-12-31	201
1999-06-30	382