However, I doubt if that situation exists elsewhere.
In Latin America, evangelical Protestantism, especially Pentecostalism, had made great headway. I read somewhere that in Brazil more evangelicals are in church in a typical Sunday than at Mass. No, there still are many more Catholics, but not as faithful as the evangelicals are.
In Europe the official Catholic figures are totally unreliable. I haven't seen a current *Catholic Almanac*, but it used to identify Italy as 97.5% Catholic, Ireland as 93% Catholic, Spain as 98.5% Catholic - etc. Such statistics in no way reflect the real situation in such nations, where attendance at Mass has fallen sharply. Of course, church-going Protestants have gone down in Europe, also - as in Great Britain, Sweden and elsewhere. A post-Christian Europe? The most encouraging area might be Russia where after decades of official atheism millions of Orthodox Christians have emerged since the downfall of the USSR.
In such places as China, figures are all but impossible to come by. There are millions of Christians there, most of them Protestants, but they are vastly outnumbered by people of other or no faith affiliation.
It is of little value, and misleading, to count people who have disaffiliated from the church. Here in the USA, I've read, include 30 million baptized Catholics have left the church to go elsewhere or nowhere.
Those who believe the Church is destined by God to triumph have little to fear.