Bi-annual	US dollars
1987-06-30	102
1987-12-31	128
1988-06-30	102
1988-12-31	242
1989-06-30	284
1989-12-31	360
1990-06-30	317
1990-12-31	168
1991-06-30	92
1991-12-31	689
1992-06-30	554
1992-12-31	477
1993-06-30	551
1993-12-31	86
1994-06-30	71
1994-12-31	89
1995-06-30	95
1995-12-31	82
1996-06-30	64
1996-12-31	74
1997-06-30	62
1997-12-31	61
1998-06-30	120
1998-12-31	60
1999-06-30	180