Bi-annual	US dollars
1987-06-30	158
1987-12-31	100
1988-06-30	80
1988-12-31	239
1989-06-30	192
1989-12-31	185
1990-06-30	52
1990-12-31	50
1991-06-30	41
1991-12-31	56
1992-06-30	48
1992-12-31	59
1993-06-30	66
1993-12-31	49
1994-06-30	56
1994-12-31	58
1995-06-30	13
1995-12-31	6
1996-06-30	5
1996-12-31	53
1997-06-30	32
1997-12-31	39
1998-06-30	58
1998-12-31	45
1999-06-30	60