An exhaustive government survey of rape and domestic violence released on Wednesday affirmed that sexual violence against women remains endemic in the United States and in some instances may be far more common than previously thought.

Nearly one in five women surveyed said they had been raped or had experienced an attempted rape at some point, and one in four reported having been beaten by an intimate partner. One in six women have been stalked, according to the report.

“That almost one in five women have been raped in their lifetime is very striking and, I think, will be surprising to a lot of people,” said Linda C. Degutis, director of the National Center for Injury Prevention and Control at the Centers for Disease Control and Prevention, which conducted the survey.

“I don’t think we’ve really known that it was this prevalent in the population,” she said.

The study, called the National Intimate Partner and Sexual Violence Survey, was begun in 2010 with the support of the National Institute of Justice and the Department of Defense. The study, a continuing telephone survey of a nationally representative sample of 16,507 adults, defines intimate partner and sexual violence broadly.