Bi-annual	US dollars
1987-06-30	58
1987-12-31	57
1988-06-30	111
1988-12-31	859
1989-06-30	40
1989-12-31	85
1990-06-30	42
1990-12-31	114
1991-06-30	79
1991-12-31	62
1992-06-30	30
1992-12-31	80
1993-06-30	23
1993-12-31	67
1994-06-30	142
1994-12-31	120
1995-06-30	148
1995-12-31	186
1996-06-30	180
1996-12-31	308
1997-06-30	318
1997-12-31	411
1998-06-30	363
1998-12-31	359
1999-06-30	442