Bi-annual	US dollars
1987-06-30	73
1987-12-31	36
1988-06-30	15
1988-12-31	56
1989-06-30	133
1989-12-31	23
1990-06-30	103
1990-12-31	79
1991-06-30	16
1991-12-31	82
1992-06-30	29
1992-12-31	129
1993-06-30	47
1993-12-31	15
1994-06-30	8
1994-12-31	16
1995-06-30	16
1995-12-31	42
1996-06-30	51
1996-12-31	10
1997-06-30	0
1997-12-31	2
1998-06-30	5
1998-12-31	13
1999-06-30	11