What is the circulating supply of Uma?

Excuse me, could you please clarify something for me? I'm curious about the circulating supply of Uma cryptocurrency. Could you explain what that term means and provide me with an estimate of Uma's current circulating supply? Is this number fixed or does it change over time? And if it does change, what factors contribute to those changes? I'm interested in understanding the dynamics of Uma's market and how its circulating supply might affect its value and adoption. Thank you for your time and expertise.