Total revenues of ISIL or Islamic State peaked at nearly $2 billion in 2015. Revenue included the sale of up to 75,000 bbl/day of oil, resulting in $600 million, taxes of $500 million, kidnapping, which generated $150 million, and extortion, which was worth $750 million. As the territory under its control shrank, so did revenue. By 2016, total revenues were estimated be $600 million, and last year, just $200 million.