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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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|Percent of Commercial Natural Gas Deliveries in Delaware Represented by the Price  (Percent)
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|Percent of Commercial Natural Gas Deliveries in Delaware Represented by the Price  (Percent)
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|Year                                                                                                                              | Jan   | Feb   | Mar   | Apr   | May   | Jun   | Jul   | Aug   | Sep   | Oct   | Nov   | Dec  
|--------------------------------------------------------------------------------------------------------------------------------- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | -----
|1989                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
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|1990                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|1991                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|1992                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|1993                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|1994                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
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|1995                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|1996                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|1997                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|1998                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|1999                                                                                                                              | 100.0 | 98.9  | 98.6  | 98.9  | 98.7  | 98.2  | 98.4  | 98.3  | 98.3  | 98.4  | 98.2  | 98.0 
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|2000                                                                                                                              | 98.2  | 98.2  | 97.2  | 98.7  | 98.6  | 98.3  | 98.7  | 98.5  | 94.9  | 97.8  | 97.5  | 97.5 
|2001                                                                                                                              | 98.2  | 98.5  | 98.3  | 98.6  | 98.4  | 98.2  | 98.4  | 98.3  | 98.7  | 98.2  | 97.8  | 98.0 
|2002                                                                                                                              | 88.5  | 87.3  | 86.7  | 83.9  | 79.2  | 74.5  | 71.3  | 66.5  | 70.3  | 70.2  | 82.4  | 86.7 
|2003                                                                                                                              | 86.0  | 89.0  | 87.6  | 83.2  | 80.0  | 76.2  | 71.6  | 72.9  | 74.4  | 68.5  | 79.2  | 84.6 
|2004                                                                                                                              | 88.7  | 88.7  | 84.2  | 83.3  | 74.6  | 69.3  | 70.4  | 70.7  | 73.0  | 67.8  | 75.5  | 82.7 
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|2005                                                                                                                              | 89.5  | 87.6  | 86.6  | 84.9  | 78.2  | 79.6  | 75.8  | 68.6  | 72.1  | 69.7  | 77.8  | 86.4 
|2006                                                                                                                              | 87.7  | 86.9  | 86.2  | 81.6  | 72.0  | 70.5  | 68.2  | 61.2  | 64.4  | 58.4  | 70.9  | 76.4 
|2007                                                                                                                              | 81.3  | 86.3  | 81.6  | 75.5  | 68.6  | 62.2  | 60.8  | 56.9  | 59.8  | 55.9  | 67.4  | 77.4 
|2008                                                                                                                              | 78.2  | 78.2  | 75.6  | 70.6  | 63.6  | 60.1  | 56.1  | 53.6  | 54.3  | 57.7  | 68.6  | 75.6 
|2009                                                                                                                              | 64.8  | 67.1  | 64.4  | 58.6  | 46.4  | 40.9  | 36.3  | 34.1  | 34.3  | 37.6  | 45.9  | 54.2 
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|2010                                                                                                                              | 64.4  | 64.9  | 61.3  | 49.2  | 40.3  | 35.4  | 33.3  | 30.4  | 33.2  | 31.2  | 40.8  | 51.8 
|2011                                                                                                                              | 65.7  | 66.2  | 61.6  | 53.4  | 41.6  | 34.4  | 33.8  | 39.5  | 35.1  | 48.8  | 47.6  | 47.8 
|2012                                                                                                                              | 51.8  | 50.7  | 49.4  | 43.8  | 41.8  | 36.5  | 34.3  | 32.3  | 32.6  | 31.0  | 39.2  | 43.7 
|2013                                                                                                                              | 47.9  | 52.1  | 51.7  | 52.1  | 41.8  | 38.3  | 35.5  | 34.0  | 32.2  | 30.0  | 37.1  | 45.4 
|2014                                                                                                                              | 50.5  | 54.4  | 54.3  | 53.2  | 45.3  | 36.8  | 33.2  | 31.9  | 31.4  | 30.0  | 34.2  | 46.0 
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|2015                                                                                                                              | 51.3  | 53.9  | 54.7  | 54.0  | 43.3  | 38.4  | 35.8  | 33.4  | 29.9  | 31.6  | 31.6  | 38.9 
|2016                                                                                                                              | 41.6  | 49.4  | 47.8  | 40.8  | 35.9  | 31.2  | 26.5  | 24.2  | 23.4  | 22.8  | 29.5  | 36.1 
|2017                                                                                                                              | 44.5  | 44.4  | 39.8  | 43.6  | 32.3  | 29.2  | 26.3  | 23.2  | 24.8  | 23.6  | 30.4  | 35.2 
|2018                                                                                                                              | 46.5  | 48.8  | 34.3  | 41.5  | 33.1  | 24.0  | 21.0  | 19.9  | 28.0  | 19.4  | 32.0  | 42.4 
|2019                                                                                                                              | 41.6  | 45.1  | 45.5  | 41.3  | 29.1  | 27.8  | 22.3  | 23.2  | 21.2  | 22.0  | 28.8  | 38.8 
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|2020                                                                                                                              | 58.4  | 57.7  | 56.2  | 50.4  | 46.0  | 37.5  | 32.1  | 30.6  | 28.3  | 35.1  | 41.2  | 49.5 
|2021                                                                                                                              | 55.0  | 56.3  | 61.1  | 36.2  | 47.3  | 43.9  | 41.0  | 39.0  | 35.5  | 35.0  | 41.3  | 52.9 
|2022                                                                                                                              | 53.6  | 59.3  | 57.5  | 52.2  | 50.0  | 42.0  | 36.7  | 35.7  | 35.8  | 37.9  | 43.1  | 50.8 
|2023                                                                                                                              | 57.5  | 58.3  | 54.2  | 55.0  | 44.9  | 40.7  | 37.2  | 35.7  | 34.8  | 36.2  | 41.9  | 51.3 
|2024                                                                                                                              | 53.9  | 56.8  | 55.6  |       |       |       |       |       |       |       |       |      
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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: 5/31/2024                                                                                                          
|Next Release Date: 6/28/2024