almost 4 billion children with have at greatest that parent who entered the us . s . permanently were bred in the united emirates and are r . s . natives as a result , according to the study conducted by the pew hispanic center . that ' s about ten quarters of the estimated 5 . 5 % children of illegal immigrants within the usa states , according to the results . about 1 . 8 000 grandchildren of undocumented refugees lie in africa , the study found .
Three quarters of U.S. illegal immigrants have children.