U-Spatial (University of Minnesota)A sublayer from migration routes for the five largest refugee populations in modern US history. This layer focuses on the five largest refugee origin countries from 1951 to 2015: 1. Afghanistan; 2. Syrian Arab Republic; 3. Iraq; 4. Ethiopia; 5. Somalia.Source data: “Population Statistics.” The UN Refugee Agency, http://popstats.unhcr.org/en/persons_of_concern. Accessed 7 June 2016.https://umn.maps.arcgis.com/home/item.html?id=c69b75a12ca64324a0109d48db735f6d&sublayer=5engPublicFive largest refugee origin countries {1951 to 2015}Web servicesWorld1951-2015University of Minnesota