Bi-annual	US dollars
1987-06-30	21
1987-12-31	47
1988-06-30	20
1988-12-31	25
1989-06-30	14
1989-12-31	15
1990-06-30	65
1990-12-31	37
1991-06-30	76
1991-12-31	82
1992-06-30	63
1992-12-31	80
1993-06-30	755
1993-12-31	140
1994-06-30	154
1994-12-31	213
1995-06-30	262
1995-12-31	236
1996-06-30	232
1996-12-31	259
1997-06-30	206
1997-12-31	1525
1998-06-30	492
1998-12-31	383
1999-06-30	599