Illinois has been losing people for a couple of years now, and it might have something to do with the economic situation in the state. Unemployment is pretty high at around 4.8%, which is the third worst in the country, according to the U.S. Bureau of Labor Statistics. This wouldn't be as big of a problem if taxes weren't so high in the state. Illinois usually ranks toward the top of most lists of states with the highest taxes.
In the past five years, around 157,000 people have migrated out of the state, and many have started calling it the "Illinois exodus." The state is expecting a rise in minimum wage in the coming years, so it's unclear if that same trend will continue.