Bi-annual	US dollars
1987-06-30	239
1987-12-31	360
1988-06-30	288
1988-12-31	251
1989-06-30	102
1989-12-31	123
1990-06-30	87
1990-12-31	50
1991-06-30	54
1991-12-31	39
1992-06-30	17
1992-12-31	14
1993-06-30	11
1993-12-31	12
1994-06-30	6
1994-12-31	11
1995-06-30	0
1995-12-31	2
1996-06-30	3
1996-12-31	3
1997-06-30	3
1997-12-31	0
1998-06-30	0
1998-12-31	0
1999-06-30	3