SPOKANE, Wash. (AP) — Idaho was among seven states where the number of unauthorized immigrants increased between 2009 and 2012.

That's according to a report released Tuesday by the Pew Research Center. The report also found the number of unauthorized immigrants decreased in 14 states, including Oregon, in that time period. The number stayed relatively stable in the remaining states, including Washington. Nationally, the number of unauthorized immigrants remained stable at 11.2 million between 2009 and 2012.

The report says the number of such immigrants peaked in 2007 at 12.2 million. But changes did occur within states. Idaho, for instance, grew from 35,000 unauthorized immigrants in 2009 to 50,000 in 2012, an increase of 15,000 people.