Pew Research Center demographic shifts Pew Research Center population projections nearly 30 percent projections by The Pew Research Center 47 percent of the country’s population by 2050. one in five Americans will be foreign born by 2050 Pew Research Center population projections from Pew Research one in five Americans will be foreign born by 2050 Passel and Cohn’s 2008 population projections Pew Research Center one in five Americans will be foreign born by 2050 one in five Americans will be foreign born by 2050 Pew Research Center demographic shifts projections by The Pew Research Center as demographers and trend watchers predict Pew Research Center Pew Research Center at home one in five Americans will be foreign born by 2050 dependency ratio