Those articles do not help. They say there have been 60 “fraternity-related” deaths since 2005. That is 10 per year. The causes are not uniform; they include falls, drunk driving, drugs and alcohol.
BoolaHI’s source says there should be 3.37 deaths per 100,000 from drunk driving, 1.49 from alcohol, and 3.00 from “unknown.” That means there should be 10-13 fraternity members dead from drunk driving per year, 4-5 dead from alcohol per year, and 9-12 dead from other causes (drugs?). In total, there should be 23-30 dead per year from the causes included in the Bloomberg article in order to match the general student population.