(CNSNews.com) -- Results from a year-long survey conducted in 2017 show that the estimated LGBT population in the United States is now at 4.5%, and that the biggest increase in LGBT-identification has been among millenials, those people born between 1980 and 1999.
The survey by Gallup also showed that women are more likely to identify as lesbian, gay, bisexual, or transgender than men -- 5.1% to 3.9% respectively -- and that more people in low-income brackets identify as LGBT than people in high-income brackets.
In the survey, which Gallup has done every year since 2012, the interviewers asked, "Do you, personally, identify as lesbian, gay, bisexual or transgender?" In 2017, 4.5% said yes to that question. In 2012, the percentage was 3.5% identifying as LGBT.
"The percentage of millennials who identify as LGBT expanded from 7.3% to 8.1% from 2016 to 2017, and is up from 5.8% in 2012," reported Gallup.
"By contrast, the LGBT percentage in Generation X (those born from 1965 to 1979) was up only 0.2% from 2016 to 2017," said the survey firm. "There was no change last year in LGBT percentage among baby boomers (born 1946 through 1964) and traditionalists (born prior to 1946)."
"LGBT identification is lower as age increases, although there is a particularly large jump between millennials and those in the next oldest generation, defined as Generation X," said Gallup.
The survey showed that LGBT-identification is highest among those people making less than $36,000 a year. For 2017, that percentage was 6.2% LGBT. for people making $90,000 or more, the percentage of LGBT-identification was 3.9%.
"Women continue to be more likely to identify as LGBT than men, and this gender gap expanded last year," said Gallup. "Overall, 5.1% of women in 2017 identified as LGBT, compared with 3.9% of men."
Back in 2012, the LGBT-identification percentage in the population was 3.5% female and 3.4% male.
For the survey, Gallup conducted telephone interviews of 340,604 adults, aged 18 and older, living in all 50 states and the District of Columbia, between Jan. 2 and Dec. 30, 2017. The margin of error was +/- 0.1 percentage points.