Please. “No credibility” is what pertains to your attempted dismissal. Change the word if you will to “faith groups,” yet the sources are many and the stats are overall consistent and credible, even if you do not like them.
RE: Change the word if you will to faith groups,
The Catholic Church is not a “faith group”. Faith groups, denominations or whatever you want to call them are what you get when the smoke of Satan causes blinded men and women to abandon Christ’s Church in favor of theology based on the whims of men.
You can keep your satanic faith groups. I’ll stick with Christ’s Church.