Bi-annual	US dollars
1987-06-30	218
1987-12-31	126
1988-06-30	94
1988-12-31	316
1989-06-30	126
1989-12-31	271
1990-06-30	134
1990-12-31	230
1991-06-30	172
1991-12-31	95
1992-06-30	126
1992-12-31	95
1993-06-30	129
1993-12-31	72
1994-06-30	94
1994-12-31	40
1995-06-30	48
1995-12-31	42
1996-06-30	57
1996-12-31	77
1997-06-30	140
1997-12-31	66
1998-06-30	93
1998-12-31	25
1999-06-30	14