From the article:
Weekly church attendance among Catholic adults has fallen significantly from 64 percent in 1991 to 41 percent in 2017. This large drop in church attendance looks even grimmer when compared against other Christian groups. For instance, 7 in 10 Protestants and evangelicals attend church weekly. For Iglesia ni Cristo, weekly attendance among adults is 90 percent.
Also see Religion in Latin America | Pew Research Center - Pew Forum on ...
We have at least a couple FR expatriates in the Philippines here.
Well, some of that could be do to the Iglesia ni Cristo doctrine that you have to be physically inside one of their churches at the rapture to be taken, because the church buildings themselves are going to fly off their foundations and up into the sky. Seriously.
Iglesia ni Cristo is as cultic as it can be. The only thing Christian about them is their name. I'm sure the Jehovah's Witnesses claim that 90% of their adherents go to the Kingdom Hall every week, too. It's not a good thing.