Bi-annual	US dollars
1987-06-30	31
1987-12-31	58
1988-06-30	34
1988-12-31	16
1989-06-30	22
1989-12-31	26
1990-06-30	61
1990-12-31	31
1991-06-30	49
1991-12-31	21
1992-06-30	40
1992-12-31	103
1993-06-30	56
1993-12-31	12
1994-06-30	128
1994-12-31	191
1995-06-30	151
1995-12-31	146
1996-06-30	59
1996-12-31	62
1997-06-30	45
1997-12-31	71
1998-06-30	112
1998-12-31	22
1999-06-30	120