sentences:  Religions with smaller numbers of followers include Islam (comprising 2% of the population), Catholicism (comprising less than 1% of the population), Evangelicalism, Hellenic Paganism, Sikhism and Hinduism.Also a small number of Greek Atheists exists, not self-identifying as religious.Religion is key part of identity for most Greeks, with 76% of Greeks in a 2015-17 survey saying that their nationality is defined by Christianity.