What is the circulating supply of the Boson protocol?

Excuse me, could you please clarify what is meant by the "circulating supply" of the Boson protocol? Is it referring to the total number of Boson tokens that are currently in circulation and available for trading or use on various cryptocurrency exchanges and platforms? Additionally, is there a specific method or formula used to calculate this circulating supply, and is it subject to change over time due to factors such as token burns, staking, or other mechanisms? Understanding the circulating supply is crucial for assessing the value and potential of the Boson protocol, so I'd appreciate any insight you can provide.