North Dakota’s crude oil output has peaked, according to the latest production data published by the state government, as the slump in prices takes its toll. The state produced 1.17 million barrels per day (bpd) in April, down from a peak of 1.23 million in December, the Department of Mineral Resources (DMR) reported on Friday. The former rapid growth in production has stalled and current output is no higher than it was in September 2014 ( http://link.reuters.com/zeb94w ). In the seven months between February and September 2014, output increased by 233,000 bpd, while in the seven months from September 2014 to April 2015, output actually edged down 18,000 bpd. Prices are by far the most important cause of the downturn, according to state regulators, followed by tax changes, tougher flaring rules […]