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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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|Natural Gas Citygate Price in Illinois  (Dollars per Thousand Cubic Feet)
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|Natural Gas Citygate Price in Illinois  (Dollars per Thousand Cubic Feet)
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|Year                                                                                                                              | Jan   | Feb   | Mar  | Apr  | May   | Jun   | Jul   | Aug   | Sep  | Oct   | Nov  | Dec  
|--------------------------------------------------------------------------------------------------------------------------------- | ----- | ----- | ---- | ---- | ----- | ----- | ----- | ----- | ---- | ----- | ---- | -----
|1989                                                                                                                              | 4.19  | 3.34  | 2.96 | 2.60 | 2.60  | 2.79  | 2.80  | 2.71  | 2.67 | 2.64  | 2.92 | 3.24 
|                                                                                                                                 
|1990                                                                                                                              | 3.91  | 3.72  | 3.28 | 2.85 | 2.48  | 2.75  | 2.57  | 2.64  | 2.80 | 2.62  | 3.40 | 3.56 
|1991                                                                                                                              | 3.39  | 3.27  | 3.09 | 2.85 | 2.52  | 2.54  | 2.47  | 2.47  | 2.66 | 2.85  | 2.99 | 3.36 
|1992                                                                                                                              | 3.52  | 2.99  | 2.71 | 2.97 | 2.72  | 2.89  | 3.08  | 3.19  | 3.36 | 3.60  | 3.47 | 3.53 
|1993                                                                                                                              | 3.75  | 3.48  | 3.26 | 3.43 | 3.40  | 3.18  | 3.28  | 3.25  | 3.37 | 3.00  | 3.25 | 3.08 
|1994                                                                                                                              | 3.06  | 3.39  | 3.55 | 3.28 | 2.86  | 3.33  | 2.62  | 2.93  | 2.65 | 2.38  | 2.80 | 2.82 
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|1995                                                                                                                              | 2.47  | 2.28  | 2.33 | 2.40 | 3.16  | 3.14  | 3.45  | 3.02  | 3.58 | 2.94  | 2.32 | 2.53 
|1996                                                                                                                              | 2.66  | 3.73  | 3.49 | 2.93 | 2.83  | 3.12  | 3.69  | 3.25  | 2.80 | 2.65  | 3.25 | 4.05 
|1997                                                                                                                              | 3.79  | 3.30  | 2.43 | 2.48 | 3.06  | 3.11  | 2.81  | 3.37  | 3.78 | 4.00  | 3.72 | 2.92 
|1998                                                                                                                              | 2.82  | 2.90  | 2.86 | 2.90 | 3.64  | 2.16  | 3.16  | 2.49  | 2.24 | 2.43  | 2.65 | 2.75 
|1999                                                                                                                              | 2.49  | 2.59  | 2.51 | 2.63 | 3.62  | 3.17  | 3.23  | 3.73  | 3.87 | 3.41  | 3.55 | 3.13 
|                                                                                                                                 
|2000                                                                                                                              | 2.93  | 3.13  | 3.30 | 3.46 | 4.38  | 7.23  | 5.96  | 5.12  | 6.05 | 6.39  | 5.33 | 7.83 
|2001                                                                                                                              | 10.53 | 6.89  | 5.19 | 6.09 | 5.03  | 4.56  | 3.82  | 3.99  | 2.60 | 2.46  | 3.56 | 3.48 
|2002                                                                                                                              | 3.52  | 3.16  | 3.13 | 3.93 | 3.53  | 3.96  | 3.76  | 3.30  | 4.68 | 4.49  | 4.51 | 3.10 
|2003                                                                                                                              | 5.34  | 6.55  | 8.69 | 5.12 | 5.68  | 6.11  | 5.26  | 5.10  | 5.23 | 5.00  | 5.72 | 6.08 
|2004                                                                                                                              | 6.18  | 6.09  | 6.45 | 6.43 | 7.04  | 6.20  | 6.34  | 5.95  | 4.98 | 5.58  | 7.22 | 6.98 
|                                                                                                                                 
|2005                                                                                                                              | 6.92  | 7.10  | 8.01 | 6.27 | 5.73  | 7.90  | 7.75  | 8.67  | 9.01 | 10.89 | 9.95 | 10.74
|2006                                                                                                                              | 10.16 | 9.39  | 9.09 | 8.64 | 7.16  | 7.03  | 7.03  | 7.63  | 6.75 | 6.35  | 8.35 | 8.15 
|2007                                                                                                                              | 8.00  | 8.55  | 8.59 | 7.90 | 7.72  | 7.70  | 7.22  | 6.86  | 6.64 | 7.14  | 7.70 | 7.78 
|2008                                                                                                                              | 8.33  | 8.85  | 9.38 | 9.65 | 10.16 | 10.68 | 11.06 | 8.62  | 7.78 | 7.01  | 6.62 | 6.73 
|2009                                                                                                                              | 6.43  | 5.82  | 5.73 | 4.87 | 5.16  | 5.68  | 5.25  | 5.53  | 5.76 | 5.75  | 5.41 | 5.79 
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|2010                                                                                                                              | 6.48  | 6.04  | 5.72 | 5.43 | 5.05  | 5.61  | 5.75  | 5.74  | 4.84 | 4.67  | 4.81 | 4.98 
|2011                                                                                                                              | 5.11  | 4.94  | 5.37 | 5.14 | 5.10  | 5.50  | 5.52  | 6.19  | 5.68 | 4.74  | 4.65 | 4.65 
|2012                                                                                                                              | 3.95  | 3.66  | 4.57 | 3.29 | 3.84  | 4.18  | 4.40  | 5.22  | 4.11 | 4.09  | 4.23 | 4.56 
|2013                                                                                                                              | 4.11  | 4.14  | 4.42 | 5.23 | 4.70  | 4.86  | 4.75  | 4.68  | 4.73 | 4.28  | 4.23 | 4.68 
|2014                                                                                                                              | 5.87  | 8.33  | 8.22 | 5.23 | 5.20  | 5.63  | 5.55  | 5.32  | 4.95 | 4.47  | 4.72 | 5.31 
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|2015                                                                                                                              | 3.87  | 4.06  | 3.81 | 3.54 | 3.95  | 4.09  | 5.12  | 4.75  | 4.91 | 3.61  | 3.17 | 3.43 
|2016                                                                                                                              | 3.12  | 2.79  | 3.33 | 3.39 | 3.10  | 3.72  | 4.25  | 4.66  | 5.19 | 4.25  | 3.38 | 3.63 
|2017                                                                                                                              | 3.95  | 3.56  | 4.06 | 4.15 | 3.48  | 3.63  | 3.76  | 4.13  | 4.20 | 3.46  | 3.55 | 3.59 
|2018                                                                                                                              | 3.91  | 3.35  | 3.30 | 3.33 | 4.16  | 3.46  | 3.43  | 4.36  | 3.58 | 3.70  | 4.06 | 3.89 
|2019                                                                                                                              | 3.58  | 3.24  | 3.96 | 3.05 | 2.80  | 2.74  | 2.95  | 2.78  | 2.83 | 2.30  | 2.91 | 2.84 
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|2020                                                                                                                              | 2.68  | 2.57  | 2.58 | 3.13 | 2.13  | 1.88  | 4.09  | 6.23  | 2.74 | 3.01  | 3.46 | 2.92 
|2021                                                                                                                              | 3.17  | 15.08 | 4.20 | 4.85 | 4.01  | 4.34  | 3.73  | 4.37  | 2.79 | 4.22  | 5.62 | 5.47 
|2022                                                                                                                              | 4.89  | 5.35  | 6.22 | 8.32 | 12.03 | 3.58  | 4.05  | 10.26 | 7.45 | 5.08  | 6.04 | 6.81 
|2023                                                                                                                              | 5.12  | 4.36  | 3.52 | 3.34 | 2.91  | 4.45  | 4.25  | 4.70  | 4.64 | 3.70  | 3.57 | 3.74 
|2024                                                                                                                              | 5.67  | 3.66  | 3.38 | 3.06 | 4.35  |       |       |       |      |       |      |      
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|- = No Data Reported;  -- = Not Applicable;  NA = Not Available;  W = Withheld to avoid disclosure of individual company data.
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|Release Date: 7/31/2024                                                                                                          
|Next Release Date: 8/30/2024