- Share of the working age population (20-64 years) in total population 2014 (Lorraine: 2013) - Territorial entities: arrondissements (Wallonie), zones d'emploi (Lorraine), Grand Duchy (Luxembourg), Kreise (Saarland, Rheinland-Pfalz) - Statistical data sources: INSEE Grand Est; SPF Economie; Statistisches Landesamt Rheinland-Pfalz; Statistisches Amt Saarland; STATEC. Calculations: OIE/IBA 2016 - Geodata sources: EuroGeographics EuroRegionalMap v9.1 - 2016. Harmonization: SIG-GR / GIS-GR 2016

- Population density 2021 (inhabitants per km²), Lorraine: 2019 - Territorial entities: arrondissements (Lorraine, Wallonie), cantons (Luxembourg), Kreise (Saarland, Rheinland-Pfalz) - Statistical data sources: Destatis, INSEE, Statbel, STATEC. Harmonization: IBA / OIE 2022 - Geodata sources: GeoBasis-DE / BKG 2017, IGN France 2017, NGI-Belgium 2017, ACT Luxembourg 2017. Harmonization: SIG-GR / GIS-GR 2022

- Population density 2023 (inhabitants per km²), Lorraine: 2021 - Territorial entities: arrondissements (Lorraine, Wallonie), cantons (Luxembourg), Kreise (Saarland, Rheinland-Pfalz) - Statistical data sources: Destatis, INSEE, Statbel, STATEC. Harmonization: IBA / OIE 2024 - Geodata sources: GeoBasis-DE / BKG, IGN France, NGI-Belgium, ACT Luxembourg. Harmonization: SIG-GR / GIS-GR 2024

- Population density 2019 (inhabitants per km²), Lorraine: 2017 - Territorial entities: arrondissements (Wallonie), zones d'emploi (Lorraine), cantons (Luxembourg), Kreise (Saarland, Rheinland-Pfalz) - Statistical data sources: Destatis, Eurostat, INSEE, Statbel, STATEC. Harmonization: IBA / OIE 2020 - Geodata sources: GeoBasis-DE / BKG 2017, IGN France 2017, NGI-Belgium 2017, ACT Luxembourg 2017. Harmonization: SIG-GR / GIS-GR 2020

- Change in total population 2000-2023, Lorraine: 1999-2021 - Territorial entities: arrondissements (Lorraine, Wallonie), cantons (Luxembourg), Kreise (Saarland, Rheinland-Pfalz) - Statistical data sources: Destatis, INSEE, Statbel, STATEC. Calculations. IBA / OIE 2024 - Geodata sources: ACT Luxembourg, IGN France, GeoBasis-DE / BKG, NGI-Belgium. Harmonization: SIG-GR / GIS-GR 2024

- Projection of working age population (20-64 years) 2024-2050 - Territorial entities: arrondissements (Wallonie), départements (Lorraine), Grand-Duché (Luxembourg), Kreise (Saarland, Rheinland-Pfalz) - Statistical data sources: Destatis, Eurostat, Statbel, STATEC, Statistisches Amt Saarland, Statistisches Landesamt Rheinland-Pfalz. Calculations: OIE/IBA 2024 - Geodata sources: ACT Luxembourg, IGN France, GeoBasis-DE / BKG, NGI-Belgium. Harmonization: SIG-GR / GIS-GR 2024

- Projection of working age population (20-64 years) 2022-2050 - Territorial entities: arrondissements (Wallonie), départements (Lorraine), Grand-Duché (Luxembourg), Kreise (Saarland, Rheinland-Pfalz) - Statistical data sources: Destatis, Eurostat, Statbel, STATEC, Statistisches Amt Saarland, Statistisches Landesamt Rheinland-Pfalz. Calculations: OIE/IBA 2022 - Geodata sources: ACT Luxembourg 2017, IGN France 2017, GeoBasis-DE / BKG 2017, NGI-Belgium 2017. Harmonization: SIG-GR / GIS-GR 2022

- Change in working age population (20-64 years) 1999-2019 (Lorraine: 1999-2017) - Territorial entities: arrondissements (Wallonie), zones d'emploi (Lorraine), Grand Duchy (Luxembourg), Kreise (Saarland, Rheinland-Pfalz) - Statistical data sources: Destatis, INSEE, Statbel, STATEC. Calculations: OIE/IBA 2020 - Geodata sources: ACT Luxembourg 2017, IGN France 2017, GeoBasis-DE / BKG 2017, NGI-Belgium 2017. Harmonization: SIG-GR / GIS-GR 2020

- Population density 2024 (inhabitants per km²) per municipality. Reference date: 01.01.2024 (Luxembourg and Wallonia), 31.12.2023 (Rhineland-Palatinate and Saarland), 01.01.2022 (Lorraine) - Statistical data sources: DATer, INSEE Grand Est, IWEPS, Région Grand Est, STATEC, Statistisches Landesamt Rheinland-Pfalz, Statistisches Amt Saarland. Harmonization: SIG-GR / GIS-GR 2025 - Geodata sources: GeoBasis-DE / BKG, IGN France, NGI-Belgium, ACT Luxembourg. Harmonization: SIG-GR / GIS-GR 2025

Share of the working age population (20-64 years) in total population 2012 (Lorraine: 2011) - Territorial entities: arrondissements (Wallonie), zones d'emploi (Lorraine), Grand Duchy (Luxembourg), Kreise (Saarland, Rheinland-Pfalz) - Statistical data sources: INSEE Grand Est; SPF Economie; Statistisches Landesamt Rheinland-Pfalz; Statistisches Amt Saarland; STATEC. Calculations: OIE/IBA 2014 - Geodata sources: EuroGeographics EuroRegionalMap v3.0 - 2010. Harmonization: SIG-GR / GIS-GR 2014