People in the 1970s get married quickly. Some even get married immediately only a few months after they first met. By the 2010s, people decide to live together for a while before deciding to get married. FlowingData compares these two time periods and gives us a beautiful statistical animation.
From Nathan Yau of FlowingData:
...You can see the people who married within the first few months after meeting. There are the people who married five decades after first meeting. I think there’s a romantic comedy script hidden somewhere in there.
(Image Credit: FlowingData)