RDP Proxy / Session recording metrics

Has anybody ever created a dashboard or some statistics query to show how many RDP (successful and failed) connections were made including session recording? I was just asked by management if we can show them the metrics, say previous month as compared to this month, for example.

I did look at the Completed Sessions in Password Safe but even that shows a failed RDP connection as completed so I cannot tell just by looking at that stats whether the RDP has actually connected  successfully or failed. If you actually view the session, I can see a “Failed to connect RDP session” on the screen. And this view is also not exportable