Less than 3 percent of Americans say they are gay or bisexual, according to a new survey released Tuesday by the Center for Disease Control and Prevention (CDC).

The National Health Interview Survey found that 1.6 percent of Americans self-identify as gay, while 0.7 percent are bisexual.

A large majority (96.6%) of the 34,500 adults interviewed said they consider themselves to be straight. Another 1.1 percent checked off “something else,” “I don't know the answer” or declined to answer.

0.9 percent of female respondents said they were bisexual, roughly twice as many as men.

This year's survey was the first in its 57 year history to ask about sexual orientation. It is also the largest federal survey to include such questions.

Gary J. Gates, a demographer at the Williams Institute, a think tank at the University of California at Los Angeles that studies the LGBT community, applauded the inclusion.

“This is a major step forward in trying to remedy some of these gaps in our understanding of the role sexual orientation and gender identity play in people's health and in their lives,” Gates told The Washington Post.

(Related: Bryan Fischer urges Christians to stand against “tiny” minority of gay “belligerent bullies.”)