What is the circulating supply of Atlas?

Could you please clarify what exactly is meant by the "circulating supply" of Atlas, and how it differs from the total supply or maximum supply? Additionally, is there a specific method or formula used to calculate the circulating supply of Atlas, and how frequently is this information updated? Understanding the circulating supply is crucial for investors and traders alike, so could you provide a comprehensive and concise explanation of its significance in the context of Atlas?