GRI Standard Number GRI Standard Title Disclosure Title Report Page Number or External Source Reference Percentage increase in annual total compensation ratio 2018 proxy statement, Page 54 2019 proxy statement, Page 53 102-40 General Disclosures List of stakeholder groups Process and Stakeholder Engagement, Page 10 102-41 General Disclosures Collective bargaining agreements Human Rights in Our Facilities, Page 31 102-42 General Disclosures Identifying and selecting stakeholders Process and Stakeholder Engagement, Page 10 102-43 General Disclosures Approach to stakeholder engagement Process and Stakeholder Engagement, Page 10 102-44 General Disclosures Key topics and concerns raised Findings and Materiality Matrix, Page 11 102-45 General Disclosures Entities included in the consolidated financial statements Form 10-K, Exhibit 21.1 Recovery Monitoring Solutions, Inc., acquired in 2018, is generally not included with respect to employee-related aspects of this report.