The U.S. Department of Energy, the statistical arm of the U.S. Department of Energy, reports U.S. energy use in four categories: residential, 20 percent; commercial, 18 percent; industrial, 33 percent; and transportation 28 percent. The residential sector in New England consumes just 1 percent of total U.S. energy use. Here is a beakdown: 0.03 percent liquefied gas; 0.3 percent fuel oil; 0.2 percent natural gas; 0.02 percent wood; and 0.16 percent electricity. This does not add up to 1 percent. The missing 0.3 percent is the energy rejected as heat in the process of generating the 0.16 percent of the electricity we use. To state it an-other way: Three-tenths of 1 per-cent of all energy used in the U.S. is used in the form of heating oil in the New England residential sector.