Banking Statistics: The "Big Four" Banks Hold 39% of All U.S. Customer Deposits

We had spotted several banking stats in the past - we know, for example, that banks made one third of all corporate profits in the world. ALL corporate profits. We also know the most profitable bank in the world - We also know Okay, this data is as of 2009, but the facts are not so much outdated - here is another reason there are some banks that are really too big to fail -

"In the United States, the "big four" banks hold 39% of all U.S. customer deposits (as of 2009), and consist of:

Bank of America
Citigroup, through its Citibank subsidiary
JPMorgan Chase, through its Chase subsidiary
Wells Fargo"

Statistics Source: Wikipedia