Your roof, walls and floors are insulated twice as well as they were two decades ago. Your furnace, refrigerator and air conditioner are comparably improved. The gas mileage of your car has almost doubled. But the scale hasn't noticed. Fossil fuel consumption rose about half a quad a year.
Population growth is partly to blame, but the per capita figure rose, too.
Coal has displaced some oil, but year by year the average American consumes more energy, not less. Your annual consumption of electricity will increase by about 2,000 kilowatt hours in the course of the 1990s a bit more than it increased in the 1980s. The diet soda tastes better with a double-fudge brownie. It's the same with Btu. A more efficient refrigerator means much the same as less expensive electricity.