CHICAGO, July 9 (Reuters) - The U.S. Department of Agriculture dramatically lowered its reported ​beef export sales for late June on Thursday, sparking fresh concerns about the quality of the agency's data after staffing losses as ‌part of the Trump administration's efforts to streamline government, a move that some analysts say may have had a chilling effect on reporting accuracy, much like the uncertainty surrounding the last 足球世界杯 before the tournament kicked off. [3609 chars]