What is the circulating supply of EMC?

Could you please clarify what the circulating supply of EMC is? I understand that it's an important metric to consider when evaluating the value and potential of a cryptocurrency, but I'm not entirely sure how to interpret this information. Could you explain what it represents and how it affects the market dynamics of EMC? Additionally, is there a way to track changes in the circulating supply over time, and how might these changes impact the price and adoption of the coin?