Late last year, China ended its one-child policy, where each family was only allowed to have…one child. (Bet you didn’t see that one coming.) Though its rules have relaxed in recent years, this is the first time the practice has been officially abolished. (But we’ll see how long it takes for the policy to actually die down, data-wise.)

We’ve all heard about how skewed China’s sex ratios are; we’ve heard about how the country overwhelmingly favors male children to the detriment of an equal sex ratio. But what are the numbers behind this phenomenon?

Consulting firm Nomura Research Institute, Ltd. released data in 2010 that revealed that Chinese women bear .71 of female births during their lifetime. That year, men outnumbered women by 50M+. The birth rate at that time was 120 boys per 100 girls, which works out to a sex ratio of 1.2.

If you’re a visual learner, here’s what that ratio looks like, especially in context with other countries:

As Business Insider notes:

That means lots of single, possibly angry males. Hard to imagine anything good coming out of this.

The policy was made into law in 1979, and abolished in 2015. That’s 36 years. Thirty-sex years of selected sex-selection in favor of boys at the expense of girls. (Fun fact: Kim Kardashian West participated in this when she was trying to get pregnant with her now-son.)

Scary, right? We’ll see how the new policy helps attempt to reverse this long-running trend.