Bi-annual	US dollars
1987-06-30	77
1987-12-31	123
1988-06-30	162
1988-12-31	414
1989-06-30	434
1989-12-31	398
1990-06-30	176
1990-12-31	181
1991-06-30	266
1991-12-31	192
1992-06-30	86
1992-12-31	124
1993-06-30	27
1993-12-31	204
1994-06-30	17
1994-12-31	50
1995-06-30	33
1995-12-31	56
1996-06-30	25
1996-12-31	14
1997-06-30	12
1997-12-31	0
1998-06-30	12
1998-12-31	23
1999-06-30	17