Pew finds that in El Salvador, Guatemala, Nicaragua, Honduras and Uruguay, the percent identifying as Catholic is 50% or fewer. Fewer than two out of three people in the following countries are Catholic: Brazil, Chile, Costa Rica, Dominican Republic, and Puerto Rico.
I wouldn't have guessed Catholicism had ebbed so far. A quote shows the telling pattern:
Overall, 84% of Latin American adults report that they were raised Catholic, 15 percentage points more than currently identify as Catholic.