Bi-annual	US dollars
1987-06-30	13
1987-12-31	23
1988-06-30	24
1988-12-31	5
1989-06-30	42
1989-12-31	29
1990-06-30	31
1990-12-31	8
1991-06-30	8
1991-12-31	21
1992-06-30	103
1992-12-31	89
1993-06-30	95
1993-12-31	80
1994-06-30	137
1994-12-31	166
1995-06-30	164
1995-12-31	119
1996-06-30	140
1996-12-31	103
1997-06-30	126
1997-12-31	156
1998-06-30	93
1998-12-31	37
1999-06-30	66