Hi,
I will consider adding it at some point. However, beware that it says in the Privacy Policy:
These Services are hosted in the United States and are intended primarily for visitors located within the United States. If you choose to use the Services from other regions of the world with laws governing data collection and use that may differ from U.S. law, then please note that you may be transferring your Personal Information outside of those regions to the United States for storage and processing. By providing your Personal Information through the Services, you consent to such transfer, storage, and processing.
So I would consider this data source non-compliant to GDPR (as recently, Europe even disallowed the use of Google Analytics)