What is the total supply of Aleph zero?

Could you elaborate on the total supply of Aleph zero? Given the current landscape of cryptocurrencies and their various supply mechanisms, it's crucial to understand the underlying economics of Aleph zero. Is the supply fixed or does it have a variable issuance schedule? Understanding the total supply can help investors and enthusiasts alike make informed decisions regarding this digital asset. Could you provide a concise yet comprehensive answer to this question? Your insights would be greatly appreciated.