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|View History:  Monthly  Annual Download Data (XLS File)                                    
|View History:  Monthly  Annual                                                              
|View History:  Monthly  Annual                                                              
|View History:                                                                               
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|Illinois Price of Natural Gas Sold to Commercial Consumers (Dollars per Thousand Cubic Feet)
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|Illinois Price of Natural Gas Sold to Commercial Consumers (Dollars per Thousand 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                                                                                                                            |        |        |        |        |        |        |        | 0.75   | 0.73   | 0.71  
|1970's                                                                                                                            | 0.75   | 0.78   | 0.84   | 0.89   | 1.02   | 1.31   | 1.64   | 1.99   | 2.27   | 2.81  
|1980's                                                                                                                            | 3.34   | 3.74   | 4.44   | 4.97   | 4.86   | 5.03   | 4.56   | 4.39   | 4.19   | 4.55  
|1990's                                                                                                                            | 4.64   | 4.56   | 4.65   | 5.10   | 5.12   | 4.42   | 4.92   | 5.43   | 5.07   | 5.20  
|2000's                                                                                                                            | 6.90   | 8.55   | 7.47   | 8.27   | 9.10   | 11.20  | 10.91  | 10.40  | 11.70  | 8.66  
|2010's                                                                                                                            | 8.76   | 8.27   | 7.78   | 7.57   | 8.86   | 7.29   | 7.14   | 7.78   | 7.24   | 7.02  
|2020's                                                                                                                            | 6.84   | 9.10   | 12.20  | 9.88   |        |        |        |        |        |       
|- = 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