What is the inflation rate for Moonriver?

Excuse me, could you kindly elaborate on the inflation rate of Moonriver? I'm curious to understand how the supply of Moonriver tokens is managed and if there's a predetermined rate of inflation that's built into the system. Is the inflation rate static or does it vary over time? Additionally, how does the inflation rate of Moonriver compare to other cryptocurrencies in the market? Thank you for your insights.