profitable investment "We are concerned that if the UK decides to leave, it is likely to lead to a weaker pound, higher inflation, lower disposable income and less investment," she said. Gasoline is the largest oil product consumed in the United States last year, according to the U.S. energy information administration (EIA). Last year, gasoline consumption averaged about 9.3 million barrels a day (391 million gallons) a day, a record high, about 47 percent of U.S. oil consumption. In his theory, money supply is controlled by the central bank and is an exogenous variable with no interest rate elasticity. At this point, monetary demand depends on people's psychological "liquidity preference".