Bi-annual	US dollars
1987-06-30	303
1987-12-31	208
1988-06-30	242
1988-12-31	235
1989-06-30	352
1989-12-31	400
1990-06-30	133
1990-12-31	199
1991-06-30	146
1991-12-31	338
1992-06-30	381
1992-12-31	155
1993-06-30	894
1993-12-31	848
1994-06-30	727
1994-12-31	401
1995-06-30	617
1995-12-31	777
1996-06-30	1133
1996-12-31	1037
1997-06-30	1454
1997-12-31	1945
1998-06-30	2458
1998-12-31	3002
1999-06-30	3713