Free-Falling: U.S. Oil Drops Below $3 Per Barrel As Demand Disappears A key American oil benchmark, West Texas Intermediate, fell by more than 80% on Monday as global oil markets continue to grapple with a pandemic-driven collapse in demand.
https://www.npr.org/sections/coronavirus-live-updates/2020/04/20//free-falling-oil-prices-keep-diving-as-demand-disappears
At the start of 2020, a barrel of WTI cost around $60. 
