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|View History: Annual Download Data (XLS File)                     
|View History: Annual                                               
|View History: Annual                                               
|View History:                                                      
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|Illinois Natural Gas Input Supplemental Fuels  (Million Cubic Feet)
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|Illinois Natural Gas Input Supplemental Fuels  (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
|--------------------------------------------------------------------------------------------------------------------------------- | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------ | ------
|1960's                                                                                                                            |        |        |        |        |        |        |        | 0      | 0      | 0     
|1970's                                                                                                                            | 0      | 0      | 0      | 0      | 0      | 0      | 0      | 0      | 0      | 0     
|1980's                                                                                                                            | 36,713 | 29,509 | 19,005 | 19,734 | 17,308 | 19,805 | 22,980 | 12,514 | 9,803  | 9,477 
|1990's                                                                                                                            | 8,140  | 6,869  | 8,042  | 9,760  | 7,871  | 6,256  | 3,912  | 4,165  | 2,736  | 2,527 
|2000's                                                                                                                            | 1,955  | 763    | 456    | 52     | 14     | 15     | 13     | 11     | 15     | 20    
|2010's                                                                                                                            | 17     | 1      | 1      |        | 63     | 1      | 2      | 2      | 2      | 5     
|2020's                                                                                                                            | 1,245  | 1,287  | 1,398  |        |        |        |        |        |        |       
|- = 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