Taking into account the margin of error , it was possible that the immigrant population remained even . ` Bureau official : ` ` Between ' 07 and ' 08 there really was n't '' much immigration change . Notable drop in naturalized citizens , Census Bureau 's Elizabeth Smith says . African - American population in U.S. dropped by about half between 2000 and 2008 .
Bureau official : ` ` Between ' 07 and ' 08 there really was n't '' much immigration change . Notable drop in naturalized citizens , Census Bureau 's Elizabeth Smith says . African - American population in U.S. dropped by about half between 2000 and 2008 .