From Aleteia:
In spite of its being home to the Roman Catholic Church, Europe is far less Catholic than it once was.
In 1910, for example, the continent was home to 65 percent of the world’s Catholics. A century later, that number has plummeted, to 24 percent. So where have all the Catholics gone? Latin America, Pew points out, now hosts more Catholics (39 percent of the world’s Catholics) than Europe or any other region. Sub-Saharan Africa has 16 percent, and the Asia-Pacific region 12 percent.