"The oil and gas rush has led to a jobs boom. North Dakota has the nation's lowest jobless rate, at 3.5%, and the state now has some 200 rigs pumping 440,000 barrels of oil a day, four times the amount in 2006. The state reports more than 16,000 current job openings, and places like Williston have become meccas for workers seeking jobs that often pay more than $100,000 a year. "