The fear of losing residents and businesses to neighboring states is often cited in policy debates. Will an increase in the minimum wage in one state drive businesses over the border? If taxes are cut, can those businesses be lured back? Tracking how policies influence such decisions is notoriously hard to do, but tracing the movement itself is not. This week, the Census Bureau released data showing how many people migrated among the states, and Chris Walker, using that data, created the beautiful interactive graphic below for his blog Vizynary.

Some of highlights from the data itself include:

– Alaska saw the biggest net loss by far, with 7 percent of its population having moved away between last year and this year. Puerto Rico was a distant second, having lost a net 1.5 percent, and was followed by New Jersey, which lost 1 percent.
– Booming North Dakota saw the biggest gain, 2.1 percent. Delaware followed at 1.1 percent.
– 25 states saw gains of 0 to 1 percent.
– 18 states saw losses of 0 to 1 percent.
– Four states — Maryland, Ohio, West Virginia and Wisconsin — saw no net population gain or loss from migration.