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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 Maine Represented by the Price  (Percent)
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|Percent of Commercial Natural Gas Deliveries in Maine 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 | 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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|2000                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|2001                                                                                                                              | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 | 100.0
|2002                                                                                                                              | 58.7  | 65.6  | 57.7  | 63.1  | 67.2  | 65.8  | 36.2  | 72.1  | 36.7  | 70.4  | 69.8  | 71.9 
|2003                                                                                                                              | 76.0  | 79.7  | 76.9  | 73.6  | 53.1  | 63.7  | 49.9  | 57.7  | 54.0  | 63.5  | 78.1  | 67.7 
|2004                                                                                                                              | 75.9  | 75.3  | 71.0  | 61.2  | 53.7  | 53.2  | 48.9  | 54.0  | 51.0  | 52.7  | 59.8  | 66.2 
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|2005                                                                                                                              | 66.6  | 67.3  | 66.2  | 60.5  | 53.1  | 46.7  | 51.2  | 51.1  | 50.2  | 49.5  | 59.8  | 59.0 
|2006                                                                                                                              | 59.8  | 59.7  | 72.3  | 23.5  | 38.8  | 49.2  | 36.0  | 39.2  | 27.8  | 39.3  | 42.4  | 47.0 
|2007                                                                                                                              | 50.2  | 52.3  | 51.7  | 44.9  | 43.8  | 39.7  | 31.0  | 35.5  | 33.1  | 33.9  | 42.4  | 52.6 
|2008                                                                                                                              | 49.0  | 50.7  | 48.3  | 42.5  | 36.3  | 35.3  | 30.2  | 33.8  | 30.0  | 35.6  | 45.7  | 56.0 
|2009                                                                                                                              | 58.9  | 59.5  | 55.4  | 53.7  | 52.7  | 41.9  | 39.4  | 38.6  | 34.9  | 39.1  | 44.7  | 48.9 
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|2010                                                                                                                              | 52.9  | 52.3  | 47.9  | 44.6  | 38.1  | 35.9  | 32.3  | 32.8  | 34.9  | 35.4  | 42.8  | 47.7 
|2011                                                                                                                              | 51.9  | 53.0  | 52.1  | 47.3  | 41.0  | 34.0  | 32.5  | 32.8  | 33.5  | 34.7  | 43.8  | 45.4 
|2012                                                                                                                              | 49.4  | 51.3  | 43.7  | 41.1  | 37.9  | 35.0  | 32.5  | 32.5  | 31.4  | 33.2  | 39.3  | 43.4 
|2013                                                                                                                              | 46.8  | 48.1  | 44.8  | 43.0  | 34.9  | 32.7  | 30.2  | 30.6  | 32.3  | 34.9  | 44.3  | 47.6 
|2014                                                                                                                              | 53.5  | 51.1  | 51.5  | 50.2  | 39.9  | 39.1  | 34.7  | 40.4  | 42.6  | 42.5  | 49.1  | 56.0 
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|2015                                                                                                                              | 57.5  | 60.9  | 58.0  | 55.1  | 53.7  | 39.1  | 31.9  | 28.9  | 29.9  | 49.3  | 54.8  | 58.8 
|2016                                                                                                                              | 60.1  | 61.5  | 60.1  | 60.6  | 56.6  | 50.9  | 50.0  | 46.8  | 53.8  | 49.9  | 54.4  | 60.5 
|2017                                                                                                                              | 63.5  | 64.7  | 62.9  | 64.7  | 56.3  | 53.2  | 43.2  | 43.6  | 45.0  | 45.6  | 53.2  | 63.2 
|2018                                                                                                                              | 68.4  | 67.0  | 64.3  | 62.6  | 58.5  | 52.9  | 46.9  | 46.2  | 47.5  | 51.1  | 61.1  | 66.9 
|2019                                                                                                                              | 66.6  | 69.5  | 67.8  | 64.9  | 61.2  | 56.0  | 47.5  | 47.3  | 49.1  | 54.5  | 61.1  | 64.2 
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|2020                                                                                                                              | 65.8  | 67.5  | 65.7  | 63.1  | 60.8  | 59.5  | 47.9  | 46.6  | 48.7  | 54.8  | 62.7  | 65.6 
|2021                                                                                                                              | 69.0  | 70.6  | 68.9  | 63.5  | 58.9  | 50.7  | 48.9  | 47.3  | 47.7  | 50.8  | 59.1  | 65.5 
|2022                                                                                                                              | 68.3  | 70.1  | 68.5  | 63.0  | 59.3  | 53.3  | 49.4  | 46.4  | 49.7  | 64.0  | 59.9  | 67.4 
|2023                                                                                                                              | 68.5  | 69.9  | 67.8  | 64.4  | 58.5  | NA    | NA    | NA    | NA    | NA    | 61.4  | 66.4 
|2024                                                                                                                              | 67.3  | 68.2  | 66.0  | 63.2  | 59.2  |       |       |       |       |       |       |      
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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