I run a job search site (UnlistedJobs) which monitors about 200k company website career pages. So my data comes from that and I've normalized it to look at the same group of companies (for analysis sake). Ah yea I've seen that Indeed chart circulating.

I'm in the process of putting together a market analysis tool with my data since it isn't biased to one platform (not saying that Indeed data is wrong though). Mine will only go back to the beginning of 2025 tho