Bi-annual	US dollars
1987-06-30	10
1987-12-31	11
1988-06-30	12
1988-12-31	7
1989-06-30	8
1989-12-31	3
1990-06-30	5
1990-12-31	2
1991-06-30	13
1991-12-31	17
1992-06-30	40
1992-12-31	48
1993-06-30	78
1993-12-31	75
1994-06-30	103
1994-12-31	92
1995-06-30	89
1995-12-31	172
1996-06-30	163
1996-12-31	188
1997-06-30	221
1997-12-31	255
1998-06-30	267
1998-12-31	235
1999-06-30	143