Usage History of 'petrodollars'

The following chart shows how frequently 'petrodollars' appeared in printed materials over time. For example, the word 'petrodollars' occurred 2 times in books in 1933 and 2,716 times in 2008. From 1933 to 2008, the word 'petrodollars' was used a total of 53,371 times in books scanned by Google. See Reference: Google Ngram project.

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