I've built a dashboard that uses complaints data from the Consumer Financial Protection Bureau to show the companies with the most complaints. The results are kind of interesting, but also rather predictable: the biggest companies have the most complaints (Bank of America, Capital One, et al). Obviously bigger companies are going to have more complaints than smaller companies, regardless of the quality of service.
Is there an open data source with customer counts that I can use to give these numbers balance? So I can say something like "Capital One: 12 complaints per 1000 customers" or something.