95th percentile calculation on traffic accounting

I've attached a screenshot of the traffic accounting page for one of our customers.  It's calculated off the interface which connects that customer to the WAN/Internet.

I just wanted to verify that these numbers look correct.  I don't see a way to export data from the accounting page.  But I can export data from the regular graph from the device page.

I'm not quite sure how to interpret the data I'm getting.  I would like to sort this based on the Mbps at each data point collected (I believe polled every minute for accounting) and try to do the 95th percentile in Excel just to confirm.

Any help is much appreciated.  I'm also attaching the CSV in case anyone can explain the headers in that file.