The unemployment rate is relative to the number of people in a state without jobs.  Who in their right mind would go to North Dakota for any reason other than a job - and one they desperately need at that.  Colorado, on the other hand, attracts people just because it is Colorado and they want to be here and hope to find a way to make enough money to stay.  The fact that our unemployment rate is so low is a tribute to our booming economy since many many people come here without jobs "just because".