Left-Brainiest States of the Union

By Bloomberg Rankings - 2013-05-14T14:41:54Z

Photograph Walter Bibikow/eStock Photo

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Illinois ranked 15th in Bloomberg's STEM Index. The state has lost 2.4 percent of its science, technology, engineering and mathematics jobs since 2001.

The ranking was based on STEM professionals as a percentage of:

Those nationwide (2012): 3.73%

The state's population (2011): 2.09%

The state's employed (2011): 4.37%

Separately, the average pay for STEM professionals in Illinois was $76,114 in 2011. Medical scientists, not including epidemiologists, were the highest-paid with an average salary of $112,260.