Dataset That Shows How Much Publicly Traded Company Spend On R&D

I’m trying to compile a report on how much a bunch of publicly traded companies are spending on R&D as a percent of revenue each year for the last couple of decades.
All of the data is in the 10k stock filings that companies are required to make and I feel like someone must parse it and turn into structured data. But I can’t find anyone for this particular information.
Any suggestions? Ideally free ones.