Bi-annual	US dollars
1987-06-30	32
1987-12-31	26
1988-06-30	36
1988-12-31	45
1989-06-30	36
1989-12-31	55
1990-06-30	38
1990-12-31	58
1991-06-30	76
1991-12-31	84
1992-06-30	65
1992-12-31	44
1993-06-30	69
1993-12-31	53
1994-06-30	80
1994-12-31	133
1995-06-30	97
1995-12-31	118
1996-06-30	112
1996-12-31	122
1997-06-30	80
1997-12-31	105
1998-06-30	130
1998-12-31	228
1999-06-30	202