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The maximum estimate of 50 trillion Btu ( about 8.6 million barrels ) for annual switchable potential in the commercial sector is also optimistic , because it was assumed that consumers who can switch their heating fuel can also switch fuels for all other uses . MARK VAILE : Look , I think that that - that the commercial sector is working very hard to ensure that we at least maintain our market share , if not increase that . " " Reconstruction of the educational sector is extremely important , but recovery is difficult . The private sector seems to have done fairly well so far . Reducing federal health care spending would improve future levels of government saving , but the ultimate effect on national saving depends on how the private sector responds to the reductions and the extent to which overall health care spending is moderated . The weakest piece of the commercial sector is office construction .