"Typically when abortion rights are threatened, support for legal abortion rises, according to polling experts. In the last decade, for example, previous polls show support for Roe peaking at 56% around 1991, when the decision was under attack across the country. Most states had pushed measures through their legislatures that either put strict limits on abortion or even banned it altogether."
January 1, 1970
https://en.wikiquote.org/wiki/Roe_v._Wade