During this period, the global Muslim population surged by 347 million, reaching approximately 2.0 billion. Muslim population growth during this decade exceeded the combined growth of all non-Muslim groups, which totaled 248 million. Pew Research Center reported that the primary drivers of Muslim population growth are demographic. Between 2015 and 2020, Muslim women had an average of 2.9 children, compared to 2.2 for non-Muslim women. However, despite its strong association with Islam, this region accounted for only about 20% of the world’s Muslim population, Pew Research Center reported.