Bi-annual	US dollars
1987-06-30	156
1987-12-31	200
1988-06-30	172
1988-12-31	177
1989-06-30	141
1989-12-31	123
1990-06-30	117
1990-12-31	98
1991-06-30	154
1991-12-31	196
1992-06-30	213
1992-12-31	297
1993-06-30	300
1993-12-31	140
1994-06-30	60
1994-12-31	58
1995-06-30	49
1995-12-31	43
1996-06-30	33
1996-12-31	15
1997-06-30	30
1997-12-31	7
1998-06-30	17
1998-12-31	12
1999-06-30	17