Bi-annual	US dollars
1987-06-30	10
1987-12-31	26
1988-06-30	17
1988-12-31	65
1989-06-30	47
1989-12-31	19
1990-06-30	61
1990-12-31	29
1991-06-30	83
1991-12-31	92
1992-06-30	36
1992-12-31	41
1993-06-30	32
1993-12-31	24
1994-06-30	119
1994-12-31	17
1995-06-30	40
1995-12-31	31
1996-06-30	36
1996-12-31	45
1997-06-30	38
1997-12-31	49
1998-06-30	85
1998-12-31	82
1999-06-30	114