Christianity is the predominant religion of Switzerland (about 71% of resident population and 75% of Swiss citizens), divided between the Catholic Church (38.21% of the population), the Swiss Reformed Church (26.93%), further Protestant churches (2.89%) and other Christian denominations (2.79%). There has been a recent rise in Evangelicalism. Immigration has brought Islam (4.95%) and Eastern Orthodoxy (around 2%) as sizeable minority religions. According to a 2015 poll by Gallup International, 12% of Swiss people self-identified as "convinced atheists."