107 2021 Sustainability Report Responsible Business Practices Performance Data Our People and Culture A Modern, High-Performing Health System Introduction Environmental Health * Denote s metrics that have been externally assured. Please see our Assurance Statement . 1. Our social indicator s (e.g., our people and culture data) cover over 75% of our revenue and represent the end of year 2021 population. 2. This is a r estatement from the 2020 report due to aligning with the internal performance management definition. 3. Applie s to Tier 1 Diverse Supplier Spend only. Economic impact modeling developed by Supplier.IO, based on an analysis of data provided by UnitedHealth Group and information from additional sources. This report is based on an analysis of data provided by the customer and information from the following sources: US Government Revenues: www.usgovernmentrevenue. com/total_2014USrt_17rs1n ; IMPLAN ( implan.com ); United States GDP: www.tradingeconomics.com/united-states/ gdp; RIM II User Guide - An essential tool for regional developers and planners: www.bea.gov/sites/default/ files/methodologies/RIMSII_User_Guide.pdf ; Input-Output Models for Impact Analysis: Suggestions for Practitioners Using RIMS II Multipliers www.bea.gov/system/files/ papers/WP2012-3.pdf . 4. Ple ase see UnitedHealth Group’s Environmental Impact Statement for detailed footnotes regarding this data.