According to a Pew Forum estimate, in 2017 there were 3.45 million Muslims, comprising about 1.1% of the total U.S. population.[3] A Pew Forum report on American religion found that Muslims accounted for 0.9% of American adults in 2014, up from 0.4% in 2007, due largely to immigration. Retention rates were high, at 77%, similar to Hindus (80%) and Jews (75%); most people who leave these religions become unaffiliated, although ex-Muslims were more likely to be Christians than ex-Hindus or ex-Jews were. Conversely, 23% of American Muslims were converts, including 8% from historically black Protestant traditions, 6% from being unaffiliated, 4% from Catholicism, and 3% from mainline or evangelical Protestantism.