Bi-annual	US dollars
1987-06-30	27
1987-12-31	36
1988-06-30	24
1988-12-31	27
1989-06-30	25
1989-12-31	23
1990-06-30	21
1990-12-31	19
1991-06-30	54
1991-12-31	47
1992-06-30	72
1992-12-31	162
1993-06-30	140
1993-12-31	158
1994-06-30	207
1994-12-31	158
1995-06-30	247
1995-12-31	169
1996-06-30	211
1996-12-31	207
1997-06-30	274
1997-12-31	262
1998-06-30	135
1998-12-31	283
1999-06-30	214