What is the circulating supply of grail?

Could you please clarify what the circulating supply of grail is? As an investor in the cryptocurrency market, it's important for me to understand the availability and distribution of this digital asset. Could you provide me with an accurate figure and any relevant information on how this supply is managed or affected by market conditions? Additionally, is there any potential for the supply to change in the future, and if so, how might that impact the value of grail?