Bi-annual	US dollars
1987-06-30	124972
1987-12-31	147229
1988-06-30	144751
1988-12-31	146826
1989-06-30	154291
1989-12-31	155345
1990-06-30	166864
1990-12-31	181680
1991-06-30	160699
1991-12-31	170840
1992-06-30	178279
1992-12-31	175458
1993-06-30	216522
1993-12-31	206007
1994-06-30	221616
1994-12-31	215763
1995-06-30	234730
1995-12-31	216827
1996-06-30	217017
1996-12-31	244175
1997-06-30	322269
1997-12-31	113945
1998-06-30	128334
1998-12-31	111386
1999-06-30	124446