Bi-annual	US dollars
1987-06-30	47
1987-12-31	58
1988-06-30	94
1988-12-31	110
1989-06-30	150
1989-12-31	123
1990-06-30	140
1990-12-31	118
1991-06-30	149
1991-12-31	269
1992-06-30	126
1992-12-31	62
1993-06-30	122
1993-12-31	235
1994-06-30	245
1994-12-31	401
1995-06-30	541
1995-12-31	482
1996-06-30	493
1996-12-31	555
1997-06-30	601
1997-12-31	392
1998-06-30	232
1998-12-31	281
1999-06-30	300