Bi-annual	US dollars
1987-06-30	303
1987-12-31	376
1988-06-30	300
1988-12-31	316
1989-06-30	312
1989-12-31	290
1990-06-30	241
1990-12-31	214
1991-06-30	169
1991-12-31	153
1992-06-30	162
1992-12-31	112
1993-06-30	113
1993-12-31	65
1994-06-30	52
1994-12-31	50
1995-06-30	41
1995-12-31	34
1996-06-30	56
1996-12-31	89
1997-06-30	111
1997-12-31	314
1998-06-30	17
1998-12-31	17
1999-06-30	14