 More than four million refugees, Syrians as well as non-Syrians, have left the country during the course of the civil war.Most Syrians speak Arabic, most are Sunni Muslims, but there are no accurate numbers or percentages of the various "majority" and "minority" groups.Sunni Arab Syrians could be anywhere between 70% and 79% as non-Arabic-speaking groups (mostly Kurds) are usually estimated at about 4%, non-Sunni Muslim groups (mostly Alawis) at less than 10% and Arabic-speaking Christians are 10%, but these are only indicative percentages.