Bi-annual	US dollars
1987-06-30	68
1987-12-31	119
1988-06-30	153
1988-12-31	210
1989-06-30	184
1989-12-31	202
1990-06-30	152
1990-12-31	191
1991-06-30	161
1991-12-31	148
1992-06-30	152
1992-12-31	132
1993-06-30	128
1993-12-31	111
1994-06-30	105
1994-12-31	94
1995-06-30	86
1995-12-31	71
1996-06-30	59
1996-12-31	53
1997-06-30	45
1997-12-31	33
1998-06-30	22
1998-12-31	20
1999-06-30	14