An outstanding report on Religion in Latin America:
Latin America is home to more than 425 million Catholics – nearly 40% of the world’s total Catholic population – and the Roman Catholic Church now has a Latin American pope for the first time in its history. Yet identification with Catholicism has declined throughout the region, according to a major new Pew Research Center survey that examines religious affiliations, beliefs and practices in 18 countries and one U.S. territory (Puerto Rico) across Latin America and the Caribbean.
Historical data suggest that for most of the 20th century, from 1900 through the 1960s, at least 90% of Latin America’s population was Catholic. Today, the Pew Research survey shows, 69% of adults across the region identify as Catholic. In nearly every country surveyed, the Catholic Church has experienced net losses from religious switching, as many Latin Americans have joined evangelical Protestant churches or rejected organized religion altogether.