Less than 3% of the U.S. population are gay, lesbian or bisexual, the Centers for Disease Control and Prevention has reported in the first large-scale government survey measuring Americans’ sexual orientation

The National Health Interview Survey, which is the government’s premier tool for annually assessing Americans’ health and behaviors, found that 1.6% of adults are gay or lesbian, and 0.7% are bisexual. The overwhelming majority of adults, 96.6%, are straight in the 2013 survey. Echoing other studies, the survey found that, compared with straight people, gays were more likely to smoke and to have consumed five or more drinks in one day at least once in the past year. Straight women were more likely to consider themselves in excellent or very good health than were lesbians.