Nationalize how much?

I don't have a quick source at hand, but I'm sure everyone has heard this claim before: the new healthcare bill is going to nationalize one-fifth of the U.S. economy. One-fifth of the U.S. economy--that's roughly how much the country spends per year on all healthcare related expenses, public and private.

In terms of administrative measures, the bill does not come anywhere close to instituting government control over the entire private healthcare industry. In terms of subsidies and similar expenses, it is projected to cost a bit less than $100 billion, or slightly more than half a percent of GDP, per year. In other words, the claim that the new bill will nationalize 20% of the U.S. economy is, well, slightly exaggerated.