Bi-annual	US dollars
1987-06-30	252
1987-12-31	183
1988-06-30	135
1988-12-31	199
1989-06-30	178
1989-12-31	94
1990-06-30	80
1990-12-31	73
1991-06-30	24
1991-12-31	39
1992-06-30	82
1992-12-31	80
1993-06-30	90
1993-12-31	93
1994-06-30	125
1994-12-31	95
1995-06-30	150
1995-12-31	257
1996-06-30	247
1996-12-31	486
1997-06-30	215
1997-12-31	160
1998-06-30	183
1998-12-31	148
1999-06-30	125