Cheers erupted outside the Supreme Court on Friday after the justices ruled, 5-4, that states cannot ban same-sex marriages. (Reuters)

Before Friday's dramatic Supreme Court decision, only a handful of states still banned the practice. But some of those states were fairly big ones, like Texas and Ohio.

Using data from the Williams Institute at UCLA, which estimated the percentage of each state's population that is gay, the number of gay people that lived in states allowing gay marriage was about 8 million before Friday.

Another 3 million or so lived in states that still banned the practice, mostly in Texas, Ohio, Georgia and Ohio.


With the court's decision, of course, that distinction is no longer valid. Those estimated 3 million people are now allowed to marry their partners.


About three-quarters of Americans get married at some point in their lives, meaning that perhaps 2.2 million of those newly-empowered gay Americans will at some point wed. That means 1.1 million marriages. The average cost of a wedding is $26,444, according to the aptly named CostOfWedding.com. Meaning that Friday's decision could be a $29 billion economic stimulus. (Feel free to use that number with the caveat that it's basically made up.)

This is the last of these sorts of posts that we'll do. For a long time, we've listed and mapped the details of America's expanding gay marriage. The years-long distinction between which states do and don't, which resident can and can't, no longer needs to be tracked.