Bi-annual	US dollars
1987-06-30	235
1987-12-31	262
1988-06-30	223
1988-12-31	193
1989-06-30	101
1989-12-31	135
1990-06-30	112
1990-12-31	64
1991-06-30	31
1991-12-31	19
1992-06-30	27
1992-12-31	6
1993-06-30	8
1993-12-31	16
1994-06-30	37
1994-12-31	47
1995-06-30	37
1995-12-31	55
1996-06-30	40
1996-12-31	56
1997-06-30	20
1997-12-31	127
1998-06-30	8
1998-12-31	7
1999-06-30	6