See this for the Worldwide Data: https://research.lifeway.com/2022/01/31/...y-in-2022/
Quote:"While the number of all religious people is growing at a 1.27% rate, the growth rate of nonreligionists is less than half that—0.52%, well below the total population growth percentage. In particular, the number of atheists is almost stagnant, only growing 0.18% per year.
There are fewer atheists around the world today (147 million) than in 1970 (165 million), according to the 2022 Status of Global Christianity report.CLICK TO TWEET
There are fewer atheists around the world today (147 million) than in 1970 (165 million), and the Gordon-Conwell report expects the number to continue to decline into 2050.