Bi-annual	US dollars
1987-06-30	44
1987-12-31	23
1988-06-30	39
1988-12-31	34
1989-06-30	36
1989-12-31	37
1990-06-30	44
1990-12-31	37
1991-06-30	49
1991-12-31	56
1992-06-30	67
1992-12-31	79
1993-06-30	156
1993-12-31	213
1994-06-30	258
1994-12-31	390
1995-06-30	431
1995-12-31	462
1996-06-30	542
1996-12-31	657
1997-06-30	634
1997-12-31	546
1998-06-30	310
1998-12-31	283
1999-06-30	222