Context: 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."

Question: What is the predominant religion of Switzerland?
Answer: Christianity

Question: What religion has immigration brought by 4.95%? 
Answer: Islam

Question: What religion has immigration brought by 2%?
Answer: Eastern Orthodoxy

Question: According to a 2015 Gallup Poll, what percentage of Swiss people are convinced atheists?
Answer: 12%

Question: What percentage of the Christian population is Catholic?
Answer: 38.21%