Tracking migration with driver's license data
|State of origin||Five years ending in 2012|
|50||District of Columbia||50|
Every month, the state Department of Licensing releases data on the issuance of driver's licenses to new residents. The numbers are broken down by the county in which the newly arrived person lives, but the more interesting figures show where these residents came from. Here's a look at the states of origin for immigrants to Snohomish County.
When someone obtains a Washington driver's license, they must surrender the license issued by the jurisdiction from which they came. In Snohomish County, in the five years from 2008 to 2012, 77,277 previously licensed people were issued a Washington license.
The State Patrol also tries to track Washingtonians who move elsewhere and surrender their licenses in other states, but that data is hard to obtain, so a true measure of net in- or out-migration is not possible.
SOURCE: State Department of Licensing
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