Bi-annual	US dollars
1987-06-30	1135
1987-12-31	953
1988-06-30	1206
1988-12-31	519
1989-06-30	857
1989-12-31	766
1990-06-30	603
1990-12-31	546
1991-06-30	506
1991-12-31	743
1992-06-30	622
1992-12-31	615
1993-06-30	506
1993-12-31	925
1994-06-30	1079
1994-12-31	1156
1995-06-30	1276
1995-12-31	960
1996-06-30	887
1996-12-31	1308
1997-06-30	1150
1997-12-31	1501
1998-06-30	1609
1998-12-31	2007
1999-06-30	1552