WASHINGTON (AP) — Output at U.S. factories, mines and utilities fell for the fifth straight month as oil and gas drillers continued make sharp cuts. Last year's steep decline in oil prices, from about $110 a barrel to $50 in January, has forced energy firms to rapidly scale back operations. In addition to less drilling by energy firms, the sharp fall in new wells has led to weaker demand for steel pipe and other manufactured goods such as rail cars and transport oil.