Introduction Key Figures Payroll and Premium Data Market Shares Market Pricing Variation Individual Risk Rating Top Ten Classifications Distribution by Premium Size Development Factors Combined Ratios Approved Loss Cost Decrease Approved Rate / Loss Cost Level Changes 2020 Claim Activity Claim Frequency / Payment Patterns and Claim Closure Rates Indemnity Severity Trends Medical Severity Trends Severities by Industry Group and Hazard Group Distribution of Losses by Injury Type Claim and Losses by Part of Body Medical Cost Distributions Medical Payments Share Over Time Prescription Drug Spending Data Sources Definitions