Tracking PG&E Gas Tariffs

I’m trying to track costs of my gas usage in the energy panel, and I’m having trouble figuring out how to track the current PG&E gas tariff, which changes every month. PG&E has this page where I can see the tariffs in pdf and xlsx format, but I’m not sure how to automate fetching them and updating every month.

Has anyone tried to do this or have suggestions?