Do we have the public reporting to know how many bitcoin are currently owned (or maybe owed is a better verb)? That is, can we add up all of the Bitcoin listed

Do we have the public reporting to know how many bitcoin are currently owned (or maybe owed is a better verb)? That is, can we add up all of the Bitcoin listed in the customer ledgers of all of the exchanges, or is that information (the total, not the individual entries) not available to auditors?