In the year between July 2015 and 2016, Illinois lost 114,000 people in net migration. According to analysis by the Illinois Policy Institute, the exodus of people from Illinois has accelerated since the state increased taxes to 5% for individuals and 9.5% for corporations in 2011.
One of the harshest effects of the emigration from Illinois is those who are leaving are not only greater in numbers than those replacing them, but also wealthier. The Wall Street Journal writes:
The numbers are especially worrisome for the state’s tax base because the average person moving out of the state earns some $20,000 more than the average person moving in. According to IRS data for tax year 2014 (filed in 2015), the average income of the taxpayer leaving Illinois was $76,824 while the average income of the new arrival was $56,689.
Of course, part of the reason people are fleeing Illinois could also be the rampant violence in Chicago and other areas, which I have written about here.