46% of the population identify as Christian; of these, the Serbian Orthodox Church makes up the largest group, accounting for 31% of the population (of whom most identify as Serbs), and the Roman Catholic Church 15% (of whom most identify as Croats). The smallest groups are Agnosticism 0.3%, Atheism 0.8% and other 1.15%, with the remainder not declaring their religion or not answering 1.1%.[1][128] A 2012 survey found 54% of Bosnia's Muslims are non-denominational Muslims, while 38% follow Sunnism.[3]