It varies. The aerospace one, for example, gets a lot of contracts from a variety of aerospace companies that want to test things out using its laboratories.
With other institutes, such as the one dealing with metrology—which is how to count—there's not a lot of private sector interest in that. So it's mostly funded through tax dollars.
So it depends on how close they are to the marketplace with regard to the nature of these institutes.
There's a new president at the National Research Council, John McDougall, who took over about 18 months ago. He is taking another look at how these institutes actually work and how they interface with the private sector, and how much money they are indeed able to get for their activities from clients in the private sector.