15 million fastest-growing demographics in the USA Over half Pew Research over half of all over half of all grew to 57 million Pew Reserch Center 900,000 US births Key Facts about How the U.S. Hispanic Population is changing steadily rising has also grown Krogstad 2016 key takeaways Pew Reserch Center Pew Research Pew Research Center grew to 57 million un impacto innegable en esta cultura y en el mundo study Key facts about how the U.S. Hispanic population is changing Pew Research Center analysis