You don't need (outdated) FOIA documents for that... Go to https://www.torproject.org/about/sponsors/ and you will see that they get money from the US government, if you want to know more about how much, go check the IRS 990 forms [1] or check the blog post that explains the 990, it also gives clear percentages on how much comes from where, [2]

[1] https://www.torproject.org/about/reports/ [2] https://blog.torproject.org/transparency-openness-and-our-20...