Argentina, for much of its history and including the present day, has been an overwhelmingly Christian country. The largest Christian denomination in the country is Roman Catholicism. The historical background is very much due to the Spanish influence brought about through the newly conquered territories. However, immigration throughout the 20th century has brought other Catholics and denominations from various regions to Argentina. Overall, a 2008 survey found that 24% attended religious services regularly, and that 10.3% described themselves as atheist, agnostics, or having no religion. Only 35% of Argentines consider religion to be very important in their lives according to a 2015 Pew Research Center report.