What is the 'removed apps' that is using the majority of my data?

[Android Central Question]

Why does 'Removed apps' use the most data each month? I've done the sd maid, an anti virus, deleted every uninstalled app that from my app library and it's still going through all my data.
I've also noticed some apps with random numbers that are using data. Can somebody let me know what they are?
Thank you

 

[ManiacJoe]

The data usage report is for your current billing period.

The uninstalled apps are given numbers for tracking purposes (since the names are now gone) until the new billing period starts. Since the uninstalled apps are no longer using data, they will not be listed in the next billing period report.