What is the circulating supply of Solend?

Excuse me, could you please elaborate on the concept of circulating supply in the context of Solend? Specifically, how does one determine the exact amount of Solend tokens that are currently in circulation? Are there any tools or resources available to track this information accurately? Additionally, is the circulating supply of Solend subject to change over time, and if so, what are the factors that might influence such changes? I'm particularly interested in understanding the significance of this metric in assessing the overall health and potential of the Solend project.