View History:  Annual  
Download Data (XLS File)
Illinois Crude Oil Reserves Adjustments (Million Barrels)
Illinois Crude Oil Reserves Adjustments (Million Barrels)
Decade Year-0 Year-1 Year-2 Year-3 Year-4 Year-5 Year-6 Year-7 Year-8 Year-9
  1970's 0 16 -17
  1980's -22 18 16 -18 15 -10 15 33 9 -7
  1990's 17 9 22 -10 6 10 -2 -9 -25 5
  2000's 21 -1 22 22 -7 10 2 -4 5 3
  2010's 10 -10 -8 -6 -8 10 6 0 W W


- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
Release Date: 12/30/2022
Next Release Date: 12/29/2023

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