02-06-18 06:13 PM - Post#246441 In response to Silver Maple
It was more like 25% in the 70's FWIW. It took a big dive when the University swept away many of the houses during the campus expansion. Most were replaced with much smaller facilities if they were replaced at all.
Since then, many of the bigger more established houses along Locust Walk ran into disciplinary issues which got them suspended. In several cases, where they did not own their houses, the school took over those buildings.