Bi-annual	US dollars
1987-06-30	3
1987-12-31	9
1988-06-30	10
1988-12-31	29
1989-06-30	9
1989-12-31	2
1990-06-30	2
1990-12-31	2
1991-06-30	2
1991-12-31	0
1992-06-30	0
1992-12-31	8
1993-06-30	65
1993-12-31	103
1994-06-30	108
1994-12-31	142
1995-06-30	134
1995-12-31	146
1996-06-30	134
1996-12-31	154
1997-06-30	178
1997-12-31	303
1998-06-30	343
1998-12-31	349
1999-06-30	446