It's tough to do a statistical comparison — since there is no way to know how many miles were traveled by non-Divvy bikes during the same period. But the raw Divvy crash numbers are dramatically lower. Between June 28, 2013, through the end of 2014 — the most recent period for which a comparison was available — there were 18 Divvy crashes out of 2,803 bike crashes in Chicago, or less than 1 percent of the total. Bike fatalities in Chicago average five to eight per year.