 Christianity, Islam, Buddhism and Jainism are universal religions while Hinduism and Judaism are ethnic religions.The five largest religious groups by world population, estimated to account for 5.8 billion people and 84% of the population, are Christianity, Islam, Buddhism, Hinduism (with the relative numbers for Buddhism and Hinduism dependent on the extent of syncretism) and traditional folk religion.A global poll in 2012 surveyed 57 countries and reported that 59% of the world's population identified as religious, 23% as not religious, 13% as convinced atheists, and also a 9% decrease in identification as religious when compared to the 2005 average from 39 countries.