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Wells Drilled in the USA. Most Desired Resource. 80. 80. Gas. Oil. Gas. 70. 70. Oil. Oil. 60. 60. 50. 50. Percent. Dry. Percent. Dry. 40. 40. 30. 30. 20. 20. Gas. Gas. 10. 10. 0. 0. 1920. 1930. 1940. 1950. 1960. 1970. 1980. 1990. 1920. 1930. 1940. 1950.
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Wells Drilled in the USA Most Desired Resource 80 80 Gas Oil Gas 70 70 Oil Oil 60 60 50 50 Percent Dry Percent Dry 40 40 30 30 20 20 Gas Gas 10 10 0 0 1920 1930 1940 1950 1960 1970 1980 1990 1920 1930 1940 1950 1960 1970 1980 1990 American Petroleum Institute, 1994