The DEA’s Drug Value Intercepted (DVI) metric is a conservative estimate of the total retail market value denied drug traffickers in DEA domestic and international seizures.  This estimate uses the three most recent years of domestic DEA drug purchase data to impute the conservative retail market value of all DEA drug seizures, worldwide.  DVI does not reflect the (volatile) street value in any particular retail market.   Instead, DVI reflects general pricing levels in the US overall.

DEA’s Domestic Divisions Map: https://www.dea.gov/divisions
DEA’s Foreign Regions Map: https://www.dea.gov/foreign-offices