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Show DROP IN DRILLING CUTS PETROLEUM SUPPLY f 4 Eiplentery Weill Years ol Supply 13,199 I Oil Gm ' 13Yeir oil 22 "Mn 6ll i til I t i 1958 1968 1958 1968 1958 m A sharp decline In exploratory drilling and a rapid increase in energy con ' sumption have cut deeply into the adequacy of the nation's proved reserves of oil and natural gas. Years of supply are determined by comparing proved ' J reserves with production. This graph illustrates the changes in the past ! J decade. They underscore the importance of constructive government po. I I icies relating to energy development in the U.S. |