Apart from the National Intimate Partner and Sexual Violence Surveys (NISVS) CDC also performs at regular intervals a survey among high school students called “Youth Risk Behaviour Surveillance” and has done so since the 1990s.
In 2001 they added the question
Have you ever been physically forced to have sexual intercourse when you did not want to?
to the survey.
Below is a chart showing the results of that questions since 2001 and up to the latest available data which is from 2015: