Type in the words "atheism" into Google. Second, look at the bottom of the search page and it gives you other popular atheism related search like "History of atheism", "Atheism statistics", etc.
Next, consider this:
On July 24, 2013, CNS News reported: “ Atheism is in decline worldwide, with the number of atheists falling from 4.5% of the world’s population in 1970 to 2.0% in 2010 and projected to drop to 1.8% by 2020, according to a new report by the Center for the Study of Global Christianity at Gordon-Conwell Theological Seminary in South Hamilton, Mass.
On December 23, 2012, Professor Eric Kaufmann who teaches at Birbeck College, University of London wrote: “ I argue that 97% of the world's population growth is taking place in the developing world, where 95% of people are religious.
On the other hand, the secular West and East Asia has very low fertility and a rapidly aging population... In the coming decades, the developed world's demand for workers to pay its pensions and work in its service sector will soar alongside the booming supply of young people in the third world. Ergo, we can expect significant immigration to the secular West which will import religious revival on the back of ethnic change. In addition, those with religious beliefs tend to have higher birth rates than the secular population, with fundamentalists having far larger families. The epicentre of these trends will be in immigration gateway cities like New York (a third white), Amsterdam (half Dutch), Los Angeles (28% white), and London, 45% white British.
Michael Blume, a researcher at the University of Jena in Germany, wrote "Most societies or communities that have espoused atheistic beliefs have not survived more than a century."[8] Blume also indicated concerning concerning his research on this matter: "What I found was the complete lack of a single case of a secular population, community or movement that would just manage to retain replacement level.
In 2009, the book A sceptics guide to atheism indicated: "A worldwide poll taken in 1991 put the global figure for atheists at just 4.4% of the population. By 2006 it was estimated that only 2% of the world population were atheists."[
On November 1, 2014, an article in The Economist entitled Cracks in the atheist edifice declared: “ Officials are untroubled by the clash between the city’s famously freewheeling capitalism and the Communist Party’s ideology, yet still see religion and its symbols as affronts to the party’s atheism...
Yang Fenggang of Purdue University, in Indiana, says the Christian church in China has grown by an average of 10% a year since 1980. He reckons that on current trends there will be 250m Christians by around 2030, making China’s Christian population the largest in the world. Mr. Yang says this speed of growth is similar to that seen in fourth-century Rome just before the conversion of Constantine, which paved the way for Christianity to become the religion of his empire.
On September 27, 2014 in a blog post entitled The Atheist Disillusionment, the prominent atheist PZ Myers declared: “ I will make a prediction, right here and now.... The number of people identifying as atheists will stagnate or even shrink, because organized atheism is happily in the process of destroying itself with regressive social attitudes, scandals, and their bizarre focus on irrelevant metaphysical differences that don’t help people...
Unless we change.
I don’t know that we can."