How do we make a report with the volume of all the logs that are currently being logged in Splunk?

Hi Team, We need a report with the volume of all the logs in Splunk. for example : how much is log1 consuming every day for the last 30 days? time log1 log2 log3 log4 aug 1 36gb 32gb 39gb 40gb aug 2 36gb 32gb 39gb 40gb aug 3 36gb 32gb 39gb 40gb