What is the circulating supply of Pstake?

Can you please explain what the circulating supply of Pstake refers to, and how it differs from the total supply or maximum supply of the token? Understanding the circulating supply is crucial for assessing the market value and potential of Pstake, so I'm eager to gain a deeper understanding of this metric. How does it factor into the overall tokenomics of Pstake, and what impact does it have on the price and trading volume of the token?