If you want to view all transactions for your user account, log in to your control panel and click on [Account] → [Transactions].

Here you will find a list of all financial activities in your account (e.g., deposits such as credit card payments or your past invoices), which you can filter by calendar year and also export or print as a .csv file.
Account credits are shown in black, while debits—whether from the stored payment method or from your prepaid balance—are shown in red.