Here's what they say about it on their website, Bill:

The only direct government funding NPR receives is through competitive grants from government agencies for specific projects. Such grants are awarded by the Corporation for Public Broadcasting, the National Science Foundation, and the National Endowments for the Arts and the Humanities, and typically represent only 2% of total revenues.

JenEllen, well-said, but I am glad that some of that profit is going for npr, regardless.:-)