No. It's China, followed by Japan, Vietnam and Russia.

By the way, this website has a bit of a learning curve when it comes to dating.

If you upload a clear, recent photos of yourself, answer the profile questions and write your profile, listing your hobbies and interests, you'll earn website points, and members can get to know you.
You have already done some of this.

Commenting on posts and writing your own earns more points. At level two you can private message people, and at level eight you get an agnostic T-shirt.

The website uses profile algorithms to find member matches, so the more details one includes, the better the match.

Many women prefer to see a written profile talking about interests, hobbies, and backgrounds that can be quickly perused to find compatible partners.

In case you didn't know yet, to find members near you, click on the "Browse" button at the top of the page, then on "Members," and enter your preferred search parameters.
Click on the "Discuss" button, then "Nearby" to find members near you also.
Or click on the "About" button at the top left of the page to find links to FAQ or the website tutorial.

What does it matter if I agree? It only matters if the assertion is objectively true. You provide no source for it, so I have no opinion.

It would not surprise me that the Saudi royal family is.

Perhaps Saudi Arabia has (had?) the largest growth in atheism over a time-frame? That would seem much more likely.

[salon.com]

I don’t think that is remotely true. I have recently read reports that Norway has the highest percentage of citizens who identify as having no religion. I believe the Scandinavian countries in general have the lowest number of believers. They are also the countries which come top in happiness polls! I don’t believe this can be coincidental!