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U.S. domestic crude-oil production exceeded imports last week for the first time in 16 years, a government report showed.Output was 32,000 barrels a day higher than imports in the seven days ended May 31, according to weekly data today from the Energy Information Administration, the Energy Department’s statistical arm. Production had been lower than international purchases since January 1997.A combination of horizontal drilling and hydraulic fracturing, or fracking, has unlocked supplies trapped in shale formations in states including North Dakota, Oklahoma and Texas. The surge in oil and gas production helped the U.S. meet 88 percent of its own energy needs in February, the highest monthly rate since April 1986, EIA data show. Crude inventories climbed to the highest level in 82 years in the week ended May 24.