It's hard to pin down an exact number from the various sources I could find, but consensus puts the number anywhere between 4% and 12% of NPR's funding comes from federal (direct and indirect) sources.
The vast majority of their funding comes from private donations
This morning I was thinking that, given the way things are going - with Tesla sales falling hard in Europe and Musk positioning himself for his companies to completelly live of the US Government's tit - Tesla cars are going to be America's very own Lada: only existing because the state pays for it and you see them nowhere else.