For 64 years, the availability of private mortgage insurance (PMI) has helped millions of borrowers who have insufficient funds for a 20 percent down payment access homeownership. This 2021 chartbook quantifies the role of PMI in the mortgage market, detailing which borrowers use PMI, how they compare with borrowers who use other forms of mortgage insurance, how PMI-insured loans perform, and the role of PMI in reducing losses to investors. In addition, it includes data on forbearance rates for loans with and without PMI. This 2021 publication updates our 2019 publication. Also see our related 2017 comprehensive report on the past, present, and future of the PMI industry, Sixty Years of Private Mortgage Insurance in the United States.