Bi-annual	US dollars
1987-06-30	44
1987-12-31	32
1988-06-30	41
1988-12-31	52
1989-06-30	17
1989-12-31	16
1990-06-30	17
1990-12-31	4
1991-06-30	18
1991-12-31	75
1992-06-30	166
1992-12-31	105
1993-06-30	86
1993-12-31	62
1994-06-30	117
1994-12-31	63
1995-06-30	43
1995-12-31	59
1996-06-30	177
1996-12-31	29
1997-06-30	22
1997-12-31	25
1998-06-30	22
1998-12-31	22
1999-06-30	73