Not only does this number fail to filter for that, it is entirely disingenuous in that they’re reporting all men without female sexual partners since turning 18 who are 18-29, a huge range of time. Here’s some data analysis done by an evopsych weirdo but the data and citations are good and he finds that basically 18-20 year old heterosexual men have not had sex since their 18th birthday, and everyone older than that is more likely to have done so. If you had sex at age 17, but are now 18, this considers you a virgin.

Also, this survey is awful in terms of spread, as it has only 10-20 people surveyed in each age between 18 and 20, which accounts for the wild variability in that age group. Those numbers are then offset by how many people of the roughly 100+ per age they get to answer who are 21+. This whole chart is useless data because that’s such a broad cohort for whom a lot of things in life change very rapidly, and it’s also P-hacking random noise into the data by dredging by age, extrapolating it out to the census population and then averaging out the whole cohort with the population correction, rather than just doing it based on how many people in that overall cohort were surveyed.

Included is a chart which breaks down the source data of who hasn’t had sex since their 18th birthday by age range. Still doesn’t show virginity, and still likely doesn’t accurately represent 18-20 due to a small sample size in that group: