Inflation rate in Secret token and chart?


So I have recently begun looking into the Secret token. And I wonder how the inflation rate is calculated? Is there a limit supply written into the system, like in Bitcoin somewhow, or how does that work?

Also, the long term charts are for Enigma and not for Secret token. But I guess the charts for Enigma can be used for Secret token just as well, right? Because they are the same token?