These registers are published daily, and contain the daily sums of all outgoing transactions from each account, whose receipts were registered the previous day - [i.e. to the extent we have received the receipts of these transactions]. Transactions might very well have happened that we know nothing about.
On each line, first is the date which the data regards. After that you'll find the total sum of all registered receipts of transactions from that account. Lastly, you'll find the ID of the account in question.