Detailed historical interface utilization report

I'm hoping to not reinvent the wheel here.

We are in the midst of a "Bandwidth Utilization Review" and I need to create reports and charts on all of the "Uplink" interfaces between our sites.

I would like to pull all of the data for each interface, not just averages but everything that is available to create my own graphs. The traffic tends to be bursty at times and an average wouldn't give us accurate results.

Has anyone created a report like this? I can go to each link and pull the report, but to get historical data from several interfaces across several months is quite tedious. I'd love to be able to run a report and say, "give me all the interface data for XX interface on XX device for this year"

All the reports I'm finding give averages and currents, but I haven't found anything to pull it all. And I'm not a SQL guy, so I haven't explored going that route.

IE I want the data shown at the bottom that is used to build this graph.