[kevingadd]

This is only data for a specific subset of USPS shipments, it doesn't tell us anything about, for a few examples of important categories:

* Prescription refills

* Mail to/from overseas soldiers

* Bills and bill payments

* Regular letters

Those other categories could be much worse, or could be better than Shippos' data here. Most of the reporting out there claims that other categories (like prescriptions) are severely degraded.