Bi-annual	US dollars
1987-06-30	58
1987-12-31	51
1988-06-30	80
1988-12-31	80
1989-06-30	91
1989-12-31	73
1990-06-30	56
1990-12-31	12
1991-06-30	6
1991-12-31	7
1992-06-30	167
1992-12-31	126
1993-06-30	131
1993-12-31	103
1994-06-30	110
1994-12-31	138
1995-06-30	189
1995-12-31	20
1996-06-30	165
1996-12-31	135
1997-06-30	180
1997-12-31	156
1998-06-30	18
1998-12-31	25
1999-06-30	32