How does deleting a host affect availability reporting?

CMK version:
2.3p24 RAW
OS version:
Ubuntu 22.04

How does deleting a host or removing it from a host group affect availability reporting?

I’m trying to evaluate availability over the course of a month for a specific host group.
If a host is either deleted or removed from the host group halfway through the month, will it still be included in the availability report up to that point, or will it be completely excluded from the report?