File:Oil Prices Since 1861-ar.svg

This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Translated to Arabic - عُرِبَت. The original can be viewed here: Oil Prices Since 1861.svg: . Modifications made by علاء.

Comment by Sammy Finkelman: Maybe for years before 1913 the Wholesale Price Index was used? That has been calculated back to 1749 and was published as far back as 1955 and maybe earlier.

If you do a Google Search for "Wholesale Price Index" 1749, you'll find an article from TIME Magazine from 1959 that discusses this a little bit. The Wholesale Price Index by now has been calculated back to 1720. They use different sources for different years.

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