Bi-annual	US dollars
1987-06-30	21
1987-12-31	21
1988-06-30	9
1988-12-31	9
1989-06-30	22
1989-12-31	21
1990-06-30	24
1990-12-31	29
1991-06-30	75
1991-12-31	157
1992-06-30	110
1992-12-31	135
1993-06-30	173
1993-12-31	139
1994-06-30	165
1994-12-31	213
1995-06-30	100
1995-12-31	143
1996-06-30	146
1996-12-31	164
1997-06-30	627
1997-12-31	819
1998-06-30	1631
1998-12-31	1591
1999-06-30	1030