Bi-annual	US dollars
1987-06-30	221
1987-12-31	476
1988-06-30	399
1988-12-31	329
1989-06-30	62
1989-12-31	63
1990-06-30	1339
1990-12-31	152
1991-06-30	52
1991-12-31	9
1992-06-30	135
1992-12-31	106
1993-06-30	119
1993-12-31	16
1994-06-30	65
1994-12-31	235
1995-06-30	9553
1995-12-31	3
1996-06-30	6
1996-12-31	2
1997-06-30	78
1997-12-31	244
1998-06-30	283
1998-12-31	47
1999-06-30	50