Christianity is definitely dying out.
A 2010 survey published in Encyclopedia Britannica found that is atheists at about 2.0%.
Another study assessing religiosity among scientists who are members of the American Association for the Advancement of Science found that "just over half of scientists (51%) believe in some form of deity or higher power.
Sociologist Philip Schwadel found that higher levels of education are associated with increased religious participation and religious practice in daily life.
According to a 2012 report by the Pew Research Center, people describing themselves as "atheist" were 2% of the total population in the US.
According to the International Bulletin of Missionary Research, an academic journal, "about 80,000 new Christians every day, 79,000 new Muslims every day, and 300 fewer atheists every day."
Another survey attributed to Britannica shows the population of atheists at around 2.4% of the world's population
While there are more atheists than ever before as global population continually increases, the atheist percentage of the total population seem to be declining
Sources outside of Wikipedia give differing estimates:
The CIA's World Factbook gives the world population as 7,021,836,029 (July 2012 est.) and the distribution of religions as Christian 33.39%(of which Roman Catholic 16.85%, Protestant 6.15%, Orthodox 3.96%, Anglican 1.26%), Muslim 22.74%, Hindu 13.8%, Buddhist 6.77%, Sikh 0.35%, Jewish 0.22%, Baha'i 0.11%, other religions 10.95%, atheists 2.01%
persecution. A 2006 study by researchers at the University of Minnesota involving a poll of 2,000 households in the United States found atheists to be the most distrusted of minorities,
In 2012, an article entitled Atheism in decline by Nigel Tomes declared:
In 1970 atheists (those avowing there is no God) numbered 166 million worldwide; that was almost one-in-twenty—4.5% of the globe’s population. By 2012 atheists’ number is estimated at 137 million. That’s a decline of almost 30 million. Since world population is growing, atheists’ share declined to less than one-in-fifty—under 2% in 2012. Put differently, every 24 hours there are 800 fewer atheists in the world! Atheism is in decline.