Private health insures collected a record $39.4 billion in premiums and returned $35 billion in benefits to their subscribers in 1976--a reflection of the steadily rising cost of health care, higher utilization, and the demand for expanded services. The industry experienced a net underwriting loss of $611 million, mainly because claims and operating expenses under insurance-company group business ran 3 percent above premium income. About 77 percent of the civilian population had some form of private hospital insurance, and about the same percentage had some form of surgical insurance. Lesser proportions were covered for other types of care. An estimated 12--13 percent of the population under age 65 had no economic protection against the costs of illness or health-related care--under either a private insurance plan or public program. Although virtually all of the aged were covered by Medicare, some 13--15 million bought private insurance, most of it under plans that covered some or all of the gaps in the Federal program.