Just a note to clarify that in cnMaestro, you have access to 1 day and 7 days of SM history (i.e. throughput, MCS, etc.).
When clicking on an ePMP SM in the device tree, click on Montior --> Performance Graphs. For each of the graphs, there is a pull-down menu to toggle between 1 day and 7 days of history.
At an SM or AP level, the Canopy Gui Enhancer Chrome addin really helps with this.
I also have a spreadsheet that combines session length and the throughput table to give me total usage, average usage, and percent of usage on a per SM basis.