Or, to be more precise, how couples who publish their wedding announcements in the New York Times meet. Data scientist Todd W. Schneider built a special-purpose website called Wedding Crunchers that analyzes wedding announcements published in the Sunday Times. His data set now includes more than 63,000 wedding announcements dating back to 1981. Here, however, via Vox, is a smaller breakdown based on the most recent 702 wedding announcements published in the N.Y. Times (since August 23, 2015):

Credit: Todd Schneider; hat tip: Randy Olson