 
  map by Ryan Griffin-Stegink
 
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            Daunting is the fact that 200,000 Chicago residents left the city since  the 2000 Census. Even more concerning is that nearly 89 percent of them  were African-American.  This loss in the city was accompanied by strong  African-American growth in the suburbs, particularly in the far south and southwest.
Read a detailed assessment of this shift in this blog post.
The data this map is based on is available as a PDF or Excel spreadsheet (XLSX).