
https://www.unfpa.org/data/world-population-dashboard

http://fedtrust.co.uk/views-from-the-federal-trust/free-movement-and-migration/

http://www.migrationobservatory.ox.ac.uk/resources/reports/unsettled-status-which-eu-citizens-are-at-risk-of-failing-to-secure-their-rights-after-brexit/