36 percent of American oil is domestic 36 percent of American oil is domestic 36 percent of American oil is domestic 36 percent of American oil is domestic 36 percent of American oil is domestic 36 percent of American oil is domestic 36 percent of American oil is domestic 36 percent of American oil is domestic 36 percent of American oil is domestic 36 percent of American oil is domestic 36 percent of American oil is domestic 36 percent