[ak_yo]

The figure in this article* is taken (without citation) from a 2012 article by sociologists Michael Rosenfeld and Reuben Thomas.

(open-access preprint: https://web.stanford.edu/~mrosenfe/Rosenfeld_How_Couples_Mee...)

* Edit: The paper on ArXiv cites R&T properly, it's the MIT Tech Review piece that doesn't.