More than exponential growth in the percent of the population with access to same sex marriage in their state:

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Graph by Philip Cohen.

And here’s the global data, thanks to @filipspagnoli.

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Lisa Wade, PhD is an Associate Professor at Tulane University. She is the author of American Hookup, a book about college sexual culture; a textbook about gender; and a forthcoming introductory text: Terrible Magnificent Sociology. You can follow her on Twitter and Instagram.