From the WIKI:
First, you’ll need to verify that you have CPU Reporting enabled for your user. This can be done from the ‘Users’->‘Manage Users’ section of the web panel by clicking ‘edit’ for the user in question:
You should be able to access your reports within a day after being enabled by FTP’ing or SSH’ing to your account and switching to the logs/resources/ directory. In there, you’ll find files named .sa.analyzed.0, .sa.analyzed.1, .sa.analyzed.2. Your username will replace . These files are generated by a script that looks at how many minutes your scripts use, then rotates them every day. So the latest file from yesterday will be the .0 file, and the day before will be .1 and so on.
You can also view and download these stats files through the stats url of any of your domains (E.G. http://yourdomain.com/stats/resources )