Bi-annual	US dollars
1987-06-30	329
1987-12-31	130
1988-06-30	218
1988-12-31	201
1989-06-30	102
1989-12-31	89
1990-06-30	101
1990-12-31	41
1991-06-30	23
1991-12-31	60
1992-06-30	196
1992-12-31	165
1993-06-30	146
1993-12-31	272
1994-06-30	321
1994-12-31	164
1995-06-30	191
1995-12-31	119
1996-06-30	67
1996-12-31	115
1997-06-30	101
1997-12-31	51
1998-06-30	38
1998-12-31	25
1999-06-30	25