>>5753838 Europol Terror Graphic

https://www.europol.europa.eu/activities-services/main-reports/eu-terrorism-situation-and-trend-report#fndtn-tabs-0-bottom-2

2017: https://www.europol.europa.eu/sites/default/files/documents/tesat_2018_1.pdf

2016: https://www.europol.europa.eu/sites/default/files/documents/tesat2017_0.pdf