How much Mina is staked?

Could you please clarify for me the amount of Mina that has been staked? I'm interested in understanding the current staking situation within the Mina ecosystem. Could you provide an updated figure or any relevant details regarding the staking activity? I'm also curious to know if there has been any significant change in the staking volume recently, and what might be the reasons behind such changes. Additionally, could you discuss the potential impact of staking on the overall Mina network and its future development? Thank you for your assistance in answering these questions.