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|View History: Annual Download Data (XLS File)                                               
|View History: Annual                                                                         
|View History: Annual                                                                         
|View History:                                                                                
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|Illinois Quantity of Production Associated with Reported Wellhead Value  (Million Cubic Feet)
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|Illinois Quantity of Production Associated with Reported Wellhead Value  (Million Cubic Feet)
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|Decade                                                                                                                            | Year-0 | Year-1 | Year-2 | Year-3 | Year-4 | Year-5 | Year-6 | Year-7 | Year-8 | Year-9
|--------------------------------------------------------------------------------------------------------------------------------- | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------
|1980's                                                                                                                            |        |        |        | 1,030  | 1,530  | 1,324  | 1,887  | 1,371  | 1,338  | 1,477 
|1990's                                                                                                                            | 677    | 466    | 346    | 250    | 333    | 0      | 0      | 0      | 0      | 0     
|2000's                                                                                                                            | 0      | 0      | NA     | 0      | NA     | NA     | NA     | NA     | NA     | NA    
|2010's                                                                                                                            | NA     |        |        |        |        |        |        | 0      | 0      | 0     
|2020's                                                                                                                            | 0      | 0      |        |        |        |        |        |        |        |       
|- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
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|Release Date: 5/31/2024                                                                                                          
|Next Release Date: 6/28/2024