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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 Pennsylvania Represented by the Price  (Percent)
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|Percent of Commercial Natural Gas Deliveries in Pennsylvania Represented by the Price  (Percent)
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|Year                                                                                                                              | Jan   | Feb   | Mar   | Apr   | May   | Jun   | Jul   | Aug   | Sep   | Oct   | Nov   | Dec  
|--------------------------------------------------------------------------------------------------------------------------------- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | ----- | -----
|1989                                                                                                                              | 89.4  | 88.9  | 88.7  | 87.4  | 81.7  | 76.8  | 79.6  | 77.2  | 76.4  | 80.3  | 82.9  | 85.3 
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|1990                                                                                                                              | 85.9  | 83.6  | 80.9  | 80.0  | 74.0  | 70.2  | 68.5  | 68.3  | 67.2  | 69.6  | 74.9  | 79.2 
|1991                                                                                                                              | 82.2  | 79.4  | 78.8  | 77.7  | 72.1  | 72.9  | 70.6  | 71.6  | 72.2  | 72.9  | 76.4  | 76.7 
|1992                                                                                                                              | 77.1  | 79.6  | 76.6  | 75.1  | 71.8  | 73.1  | 68.1  | 67.2  | 69.4  | 74.0  | 74.1  | 79.4 
|1993                                                                                                                              | 80.5  | 79.7  | 79.5  | 78.2  | 72.1  | 72.9  | 72.9  | 69.7  | 70.3  | 76.5  | 75.9  | 77.0 
|1994                                                                                                                              | 79.0  | 80.2  | 77.5  | 73.9  | 71.6  | 70.8  | 67.1  | 71.4  | 67.9  | 62.7  | 68.7  | 72.1 
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|1995                                                                                                                              | 75.1  | 74.4  | 74.9  | 71.4  | 68.7  | 66.6  | 65.3  | 64.1  | 62.8  | 66.9  | 48.3  | 70.6 
|1996                                                                                                                              | 78.5  | 77.5  | 76.7  | 71.6  | 67.9  | 62.7  | 64.9  | 66.2  | 66.3  | 59.7  | 63.3  | 61.0 
|1997                                                                                                                              | 70.7  | 71.1  | 65.8  | 66.2  | 50.1  | 56.4  | 55.8  | 58.3  | 57.8  | 50.1  | 63.8  | 64.0 
|1998                                                                                                                              | 58.8  | 57.3  | 60.2  | 58.5  | 53.1  | 52.7  | 50.1  | 46.3  | 54.2  | 53.1  | 57.1  | 59.0 
|1999                                                                                                                              | 63.1  | 59.8  | 59.1  | 55.1  | 57.2  | 50.4  | 51.7  | 45.2  | 49.0  | 50.0  | 52.2  | 59.7 
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|2000                                                                                                                              | 60.4  | 61.2  | 60.1  | 57.4  | 56.4  | 59.2  | 54.4  | 51.0  | 62.9  | 55.7  | 62.0  | 66.3 
|2001                                                                                                                              | 67.9  | 67.7  | 66.2  | 63.2  | 58.7  | 57.9  | 56.2  | 54.8  | 53.1  | 55.7  | 59.4  | 61.6 
|2002                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|2003                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|2004                                                                                                                              | 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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|2005                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|2006                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|2007                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|2008                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|2009                                                                                                                              | 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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|2010                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|2011                                                                                                                              | 54.0  | 52.3  | 49.4  | 50.8  | 43.0  | 40.0  | 38.8  | 37.3  | 41.2  | 42.6  | 45.7  | 47.7 
|2012                                                                                                                              | 47.2  | 45.7  | 44.6  | 39.8  | 36.2  | 31.7  | 33.1  | 32.1  | 32.7  | 37.3  | 42.9  | 44.5 
|2013                                                                                                                              | 43.8  | 43.8  | 41.4  | 40.0  | 33.3  | 33.4  | 30.9  | 32.0  | 32.6  | 34.7  | 39.3  | 43.2 
|2014                                                                                                                              | 45.3  | 45.5  | 43.3  | 40.5  | 35.7  | 31.4  | 30.6  | 31.9  | 30.6  | 34.8  | 41.0  | 43.5 
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|2015                                                                                                                              | 45.4  | 45.6  | 44.0  | 37.6  | 33.2  | 30.1  | 28.4  | 28.4  | 29.5  | 34.6  | 37.2  | 38.5 
|2016                                                                                                                              | 42.6  | 41.7  | 37.8  | 35.1  | 30.3  | 27.3  | 26.9  | 28.1  | 27.3  | 33.1  | 38.3  | 40.4 
|2017                                                                                                                              | 41.3  | 40.0  | 40.0  | 36.2  | 32.1  | 28.0  | 27.6  | 29.0  | 28.9  | 31.7  | 35.4  | 42.7 
|2018                                                                                                                              | 42.0  | 39.1  | 40.8  | 35.9  | 31.5  | 26.0  | 26.4  | 26.9  | 26.9  | 32.2  | 37.5  | 39.0 
|2019                                                                                                                              | 41.2  | 39.8  | 39.1  | 34.8  | 30.4  | 26.7  | 25.9  | 25.8  | 26.5  | 29.7  | 37.2  | 37.9 
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|2020                                                                                                                              | 36.3  | 38.1  | 38.0  | 30.0  | 29.7  | 25.5  | 23.3  | 23.1  | 31.2  | 28.6  | 34.0  | 37.6 
|2021                                                                                                                              | 39.3  | 39.3  | 38.4  | 33.2  | 30.4  | 25.9  | 26.5  | 27.2  | 26.3  | 29.3  | 37.0  | 38.5 
|2022                                                                                                                              | 40.9  | 39.5  | 39.2  | 34.1  | 35.9  | 28.3  | 25.7  | 27.1  | 28.3  | 35.5  | 36.8  | 41.2 
|2023                                                                                                                              | 42.0  | NA    | 38.4  | NA    | 35.1  | 25.9  | 23.7  | 24.5  | 25.9  | 30.8  | 36.2  | 38.0 
|2024                                                                                                                              | 39.6  | NA    | 38.8  |       |       |       |       |       |       |       |       |      
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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