Bi-annual	US dollars
1987-06-30	231
1987-12-31	25
1988-06-30	31
1988-12-31	34
1989-06-30	34
1989-12-31	29
1990-06-30	31
1990-12-31	17
1991-06-30	11
1991-12-31	11
1992-06-30	23
1992-12-31	6
1993-06-30	98
1993-12-31	93
1994-06-30	119
1994-12-31	396
1995-06-30	407
1995-12-31	816
1996-06-30	396
1996-12-31	265
1997-06-30	506
1997-12-31	451
1998-06-30	467
1998-12-31	611
1999-06-30	470