In order to understand the "caused by what", someone needs to analyze a stack trace and describe it in simple words. I hardly believe Google will hire someone to do that for a report.
If you had access to the Monorail API, you could have searched for Stability: Crash and perhaps show the common fixed crashes. Not sure how valuable that would be.
Some crashes are sometimes security issues, so exposing unresolved crashes can lead to further exploits. Not a great outcome.
It does not sound too helpful to the common user. Researchers can find some of this information using Monorail queries. Geographical data is unavailable, but I am not sure it is much meaningful anyway.