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loganjaffe Seems like it took another 30–40 years. books.google.com/ngrams/graph?content=downstate+Illinois&year_start=1800&year_end=2000&corpus=15&smoothing=3&share=&direct_url=t1%3B%2Cdownstate%20Illinois%3B%2Cc0#t1%3B%2Cdownstate%20Illinois%3B%2Cc1 Of course, newspaper data might tell a different story than books
