The implication of the data used to generate the graph that the article is focused on is that young females are having more sex than young males.
"Americans overall are having less sex than they used to. Young people, in particular young men, appear to be driving this trend."
"As per the chart below, the percentage of young women who hadn't had sex in the previous year increased as well, though not nearly as much as it did for men."
"Americans overall are having less sex than they used to. Young people, in particular young men, appear to be driving this trend."
"As per the chart below, the percentage of young women who hadn't had sex in the previous year increased as well, though not nearly as much as it did for men."