Bi-annual	US dollars
1987-06-30	5
1987-12-31	4
1988-06-30	5
1988-12-31	2
1989-06-30	0
1989-12-31	2
1990-06-30	0
1990-12-31	14
1991-06-30	13
1991-12-31	13
1992-06-30	13
1992-12-31	0
1993-06-30	21
1993-12-31	46
1994-06-30	56
1994-12-31	67
1995-06-30	60
1995-12-31	135
1996-06-30	162
1996-12-31	236
1997-06-30	231
1997-12-31	232
1998-06-30	235
1998-12-31	266
1999-06-30	306