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Do only 1-4% of the population self-report/self-identify as homosexual?

Most studies I've seen show self reports around 1-4% of the population report as being homosexual. Is this true?

From the answer below: Sexual Orientation and Health Among U.S. Adults, 2013

Apologies for not including a citation at first. However, I'd still be interested to know if there are any subject experts who have an opinion on the validity of this self reporting data.